Greenhouse gas reduction amount calculation apparatus and greenhouse gas reduction amount calculation method

Abstract

To provide a greenhouse gas reduction amount calculation apparatus and a greenhouse gas reduction amount calculation method which can contribute to the promotion of biochar.SOLUTION: An emissions reduction support system 1 comprises a reduction amount calculation apparatus 10. The reduction amount calculation apparatus 10 comprises a reading unit 111, a calculation unit 112, and a database 13. The reading unit 111 acquires a first reduction amount as a greenhouse gas reduction amount per unit weight of biochar B, an application amount as the total weight of the biochar B used during a unit period per unit area of an agricultural land N, and a target production amount as the total weight of a target agricultural product AP as an agricultural product produced during the unit period per unit area of the agricultural land N from the database 13. The calculation unit 112 calculates a second reduction amount as a greenhouse gas reduction amount per unit period per unit area of the agricultural land N based on the first reduction amount and the application amount, and calculates a third reduction amount as a greenhouse gas reduction amount per unit weight of each target agricultural product AP based on the second reduction amount and the target production amount.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a greenhouse gas reduction amount calculation device and a reduction amount calculation method. [Background technology]

[0002] In recent years, reducing greenhouse gas emissions has become a social issue. To address this issue, various carbon-neutral technologies have been proposed. One such technology, "biochar," is made by carbonizing biomass and is used to improve soil such as agricultural land. Biochar buried in agricultural land can fix carbon in the soil, and therefore can contribute to reducing greenhouse gas emissions (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2023-26175 Summary of the Invention [Problem to be solved by the invention]

[0004] However, biochar is relatively expensive and has not yet become widespread in Japan.

[0005] The present invention has been made in consideration of the above circumstances, and has as its main object to provide a greenhouse gas reduction calculation device and a reduction calculation method that can contribute to the promotion of the use of biochar. [Means for solving the problem]

[0006] In order to solve the above problems, the reduction amount calculation device of the first invention includes an acquisition unit that acquires a first reduction amount, which is the amount of greenhouse gas reduction per unit weight of biochar, an application amount, which is the total weight of the biochar used on a unit area of ​​farmland during a unit period, and a target production amount, which is the total weight of target agricultural products that are agricultural products produced on the unit area of ​​farmland during the unit period, and a calculation unit that calculates a second reduction amount, which is the amount of greenhouse gas reduction per unit period in the unit area of ​​farmland based on the first reduction amount and the application amount, and calculates a third reduction amount, which is the amount of greenhouse gas reduction per unit weight of the target agricultural product based on the second reduction amount and the target production amount.

[0007] The reduction amount calculation device of the second invention is the same as that of the first invention, in that when a product containing the target agricultural product as a raw material is treated as a target product, the acquisition unit acquires a target content, which is the weight of the target agricultural product per quantity of the target product, and the calculation unit calculates the greenhouse gas reduction amount per quantity of the target product based on the third reduction amount and the target content.

[0008] The reduction amount calculation device of the third invention is the same as that of the second invention, in which the calculation unit calculates the greenhouse gas reduction amount per quantity of the target product based on the third reduction amount and the target content for each of the target agricultural products when the target product contains multiple target agricultural products produced on different agricultural lands as raw materials.

[0009] A fourth aspect of the present invention is a reduction amount calculation device according to either the second or third aspect of the present invention, wherein the biochar is produced using, as a raw material, a residue discharged in the production of the target product.

[0010] A fifth invention's reduction amount calculation method is a calculation method executed by an information processing device, and includes a first acquisition step of acquiring a first reduction amount, which is the amount of greenhouse gas reduction per unit weight of biochar, an application amount, which is the total weight of the biochar used on a unit area of ​​farmland during a unit period, and a target production amount, which is the total weight of target agricultural products which are agricultural products produced on the unit area of ​​farmland during the unit period; and a first calculation step of calculating a second reduction amount, which is the amount of greenhouse gas reduction per unit period in the unit area of ​​farmland based on the first reduction amount and the application amount, and calculating a third reduction amount, which is the amount of greenhouse gas reduction per unit weight of the agricultural product, based on the second reduction amount and the target production amount.

[0011] The reduction amount calculation method of the sixth invention, in the fifth invention, comprises a second acquisition step of acquiring a target content, which is the weight of the target agricultural produce per quantity of the target product, and a second calculation step of calculating a greenhouse gas reduction amount per quantity of the target product based on the third reduction amount and the target content. Effect of the Invention

[0012] According to the present invention, it is possible to provide a greenhouse gas reduction amount calculation device and a reduction amount calculation method that can contribute to the promotion of the use of biochar. [Brief description of the drawings]

[0013] [Figure 1] 1 is a system configuration diagram illustrating an example of the overall configuration of an emission reduction support system 1 in one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the contents of a database 13. [Diagram 3] 13 is a flowchart showing a second calculation process. [Figure 4] 13 is a flowchart showing a first calculation process. [Diagram 5] FIG. 11 is a system configuration diagram illustrating an example of the overall configuration of an emission reduction support system 1 when applied to a business model according to another example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an emission reduction support system 1 according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a system configuration diagram illustrating an example of the overall configuration of the emission reduction support system 1. Fig. 2 is a schematic diagram showing the contents of the database 13.

[0015] The emission reduction support system 1 is used, for example, in a business model for promoting the spread of biochar. First, the configuration of the emission reduction support system 1 will be described.

[0016] Biochar is a carbonized biological resource, for example, "biochar for soil carbon storage" as specified by the Japan Biochar Promotion Association standard (JBAS0001). Biochar is made by carbonizing organic resources such as waste wood and food waste to produce biochar, which is a highly stable carbon that is difficult to decompose, and can sequester carbon in soil or water for a long period of time. This can contribute to reducing greenhouse gas emissions. The amount of greenhouse gas sequestered in soil or water by biochar (sometimes referred to as "storage amount") can also be said to be the amount of greenhouse gas emissions reduced by biochar. In this specification, the reduction in greenhouse gas emissions is sometimes simply referred to as "emission reduction," and the amount of greenhouse gas emissions reduced is sometimes simply referred to as "reduction amount."

[0017] The emission reduction support system 1 includes a reduction amount calculation device 10 and an information terminal 21.

[0018] The reduction amount calculation device 10 has a control unit 11, a database 13 that stores various information, a printer 14, an operation unit 15 which is an input device such as a keyboard or a touch panel, and a communication unit 16 which communicates with external devices via a network.

[0019] The control unit 11 includes a CPU, a GPU, etc., and executes various control processes. The control unit 11 includes a reading unit 111 and a calculation unit 112.

[0020] The reading unit 111 reads various information from the database 13 .

[0021] The calculation unit 112 executes a first calculation process and a second calculation process, which will be described later. Note that the first calculation process and the second calculation process may be collectively referred to as the "calculation process" when there is no particular need to distinguish between them.

[0022] The database 13 can store information used in the calculation process by the calculation unit 112. When the control unit 11 acquires various information, the control unit 11 can store the information in the database 13. In addition, the control unit 11 can store the result of the calculation process by the calculation unit 112 in the database 13.

[0023] The printer 14 is capable of executing a print process for printing the result of the calculation process. The control unit 11 is capable of causing the printer 14 to execute the print process.

[0024] The information terminal 21 is, for example, a personal computer. The information terminal 21 can store various information. The information terminal 21 can transmit and receive information to and from the reduction amount calculation device 10 via a network or the like.

[0025] Next, the operation of the emission reduction support system 1 according to this embodiment will be described. First, an example of a business model to which the emission reduction support system 1 is applied will be described.

[0026] First, biochar B is produced. Biochar B is produced, for example, in a biochar production facility 100. The biochar production facility 100 is, for example, a biogas power generation facility, and is capable of producing biochar B by utilizing waste heat during power generation, etc.

[0027] Biochar B is sold to, for example, farmer F. Biochar B is applied to farmland N by farmer F. When biochar B is applied to farmland N, greenhouse gases are stored in the farmland N. Therefore, by applying biochar B to farmland N, environmental value is created according to the amount of greenhouse gas stored. Note that the environmental value is subject to so-called emissions trading and can be sold to a third party. In addition, the amount of greenhouse gas stored per unit weight of biochar B can also be said to be the amount of greenhouse gas reduction per unit weight of biochar B, and will be referred to as the "first reduction amount" below.

[0028] Agricultural crop AP is produced in agricultural land N to which biochar B has been applied. The total weight of biochar B used on a unit area of ​​agricultural land N during a unit period is defined as the "application amount." Agricultural crop AP produced on a unit area of ​​agricultural land N during a unit period is defined as the "target agricultural product AP." The unit period is, for example, one year. The unit area is, for example, the planted area for each agricultural crop AP (target agricultural product AP).

[0029] More specifically, there are a first farmer F1 and a second farmer F2 as farmers F. The first farmer F1 owns a first farmland N1 and a second farmland N2, and the second farmer F2 owns a third farmland N3. When there is no particular need to distinguish between them, the first farmer F1 and the second farmer F2 may be collectively referred to as "the respective farmers F," and the first farmland N1, the second farmland N2, and the third farmland N3 may be collectively referred to as "the respective farmlands N."

[0030] In the first farmland N1, a first agricultural product AP1 (e.g., spinach) is produced. In the second farmland N2, a second agricultural product AP2 (e.g., cabbage) is produced. In the third farmland N3, a third agricultural product AP3 (e.g., bell peppers) is produced. The first agricultural product AP1, the second agricultural product AP2, and the third agricultural product AP3 are cultivated once a year. Biochar B is applied to each farmland N once a year, more specifically, biochar B is applied at the time of each cropping.

[0031] The first agricultural product AP1, the second agricultural product AP2, and the third agricultural product AP3 produced in each farmland N during the unit period correspond to the "covered agricultural products" and may be referred to as the "first covered agricultural product AP1," the "second covered agricultural product AP2," and the "third covered agricultural product AP3" below. Furthermore, when there is no particular need to distinguish between them, the first covered agricultural product AP1, the second covered agricultural product AP2, and the third covered agricultural product AP3 may be collectively referred to as the "respective covered agricultural products AP."

[0032] The environmental value created in farmland N can be added to the target agricultural product AP. In what follows, the environmental value added to the agricultural product is referred to as "environmental value V1."

[0033] Each of the target agricultural products AP to which the environmental value V1 has been added is purchased, for example, by an electric power company E. This ensures a sales destination for each of the target agricultural products AP, and therefore provides an incentive for each farmer F to use biochar B.

[0034] Thereafter, each of the covered agricultural products AP is used to manufacture a covered product P, which is a product that contains the covered agricultural product as an ingredient. The covered product P is, for example, a boxed lunch. In the following, the covered product P may be referred to as a "boxed lunch P." A "boxed lunch" refers to a meal that is contained in a container and is portable. The boxed lunch P has a box and food contained in the box.

[0035] The lunches P are manufactured, for example, by a lunch box manufacturer M. Each target agricultural product AP is provided by an electric power company E to the lunch box manufacturer M. At the lunch box manufacturer M, each target agricultural product AP is processed into a lunch box P. The lunch box P is delivered from the lunch box manufacturer M to the electric power company E.

[0036] Lunch boxes P are made using a specified weight of each targeted agricultural product AP. The weight of the first targeted agricultural product AP1 per quantity of lunch boxes P is referred to as the "first targeted content." The weight of the second targeted agricultural product AP2 per quantity of lunch boxes P is referred to as the "second targeted content." The weight of the third targeted agricultural product AP3 per quantity of lunch boxes P is referred to as the "third targeted content." When there is no particular need to distinguish between them, the first targeted content, second targeted content, and third targeted content are sometimes collectively referred to as the "target content."

[0037] The first target content can be calculated, for example, by dividing the total weight of the first target agricultural product AP1 purchased for use in producing the packed lunches P by the number of packed lunches P. The second target content and the third target content can be calculated in a similar manner. Furthermore, the weight of the portion of the target agricultural product that becomes residue may be deducted from the weight of the target agricultural product when calculating the target content.

[0038] Because lunch box P uses the target agricultural product AP as an ingredient, it is considered that lunch box P has environmental value derived from the target agricultural product AP. For this reason, environmental value can be added to lunch box P. In what follows, the environmental value added to target product P is referred to as "environmental value V2."

[0039] The target product P to which the environmental value V2 has been added is sold by the electric power company E to a consumer C1. The consumer C1 is not particularly limited, but may be, for example, a company. This creates demand for each target agricultural product AP as a raw material for the target product P, providing each farmer F with an additional incentive to use biochar B. This in turn promotes the widespread use of biochar.

[0040] Here, it is believed that the above-mentioned business model can be implemented more smoothly by supporting the calculation of the environmental value. Furthermore, the environmental value can be calculated based on the amount of greenhouse gas emissions reduced.

[0041] Therefore, the emission reduction support system 1 calculates, for example, the amount of greenhouse gas reduction per quantity of the target product P. The following describes the operation of the emission reduction support system 1. The reduction amount calculation device 10 is provided in the electric power company E, for example.

[0042] First, the database 13 stores information used in the calculation process by the calculation unit 112. In detail, the database 13 stores a first reduction amount, a target product, a target agricultural product, an application amount, a target production amount, and a target content amount. As shown in Fig. 2, the database 13 stores, for each target product, the target agricultural products contained in the target product, and for each target agricultural product, the application amount in the farmland where the target agricultural product was produced, the target production amount of the target agricultural product, and the target content amount of the target agricultural product are stored in association with each other.

[0043] The information terminals 21 include, for example, a first information terminal 21A, a second information terminal 21B, and a third information terminal 21C. The first information terminal 21A is used, for example, by a first farmer F1, and the second information terminal 21B is used, for example, by a second farmer F2. The third information terminal 21C is used, for example, by a bento maker M. When there is no particular need to distinguish between them, the first information terminal 21A and the second information terminal 21B may be collectively referred to as "the information terminals 21A, 21B," and the first information terminal 21A, the second information terminal 21B, and the third information terminal 21C may be collectively referred to as "the information terminals 21."

[0044] Among the information stored in the database 13, information on the target agricultural products, for example, the application amount in the farmland where the target agricultural products are produced and the target production amount of the target agricultural products, is stored in each information terminal 21A, 21B. Information on the target products, for example, the target agricultural products contained in the target products and the target content of each target agricultural product, is stored in the information terminal 21C. The reduction amount calculation device 10 acquires the information from each information terminal 21 and stores it in the database 13. However, the reduction amount calculation device 10 does not need to acquire the information from each information terminal 21. The information may be directly input to the reduction amount calculation device 10. For example, the information may be input to the reduction amount calculation device 10 through the operation unit 15. Therefore, each information terminal 21 is not a required component.

[0045] Next, the second calculation process executed by the reduction amount calculation device 10 (the reading unit 111 and the calculation unit 112) will be described with reference to Fig. 3. The second calculation process is a process for calculating the reduction amount of greenhouse gases per quantity of the target product P.

[0046] Fig. 3 is a flowchart showing the second calculation process. The flowchart in Fig. 3 is executed based on a request to execute the second calculation process via the operation unit 15. In the request to execute the second calculation process, a target product is specified. The reduction amount calculation device 10 executes the second calculation process for the specified target product. Below, an example will be described in which lunch box P is the target of the second calculation process.

[0047] 3, in step S11, the reader 111 identifies target agricultural products stored in association with the designated target product in the database 13. Specifically, when a lunch box P is designated as the target agricultural product, the reader 111 identifies a first target agricultural product AP1, a second target agricultural product AP2, and a third target agricultural product AP3. Then, the process proceeds to step S13.

[0048] In step S13, the greenhouse gas reduction amount per unit weight of the first target agricultural product AP1 is calculated. If the process of calculating the greenhouse gas reduction amount per unit weight of each target agricultural product (hereinafter referred to as the "third reduction amount") is referred to as the "first calculation process," then in this step S13, the first calculation process is executed for the first target agricultural product AP1. The first calculation process for the first target agricultural product AP1 will now be described with reference to Fig. 4. Fig. 4 is a subroutine showing the first calculation process.

[0049] 4, in step S21, the reader 111 accesses the database 13 and reads out the first reduction amount stored in association with the first target agricultural product AP1. Then, the process proceeds to step S22.

[0050] In step S22, the reading unit 111 reads the application amount stored in association with the first target agricultural product AP1 from the database 13. Then, the process proceeds to step S23. The reading unit 111 corresponds to an acquisition unit.

[0051] In step S23, the calculation unit 112 calculates a second reduction amount of the first target agricultural product AP1 based on the first reduction amount read out in step S21 and the application amount read out in step S22. More specifically, the calculation unit 112 calculates the second reduction amount by multiplying the first reduction amount by the application amount. The calculation unit 112 stores the second reduction amount in association with the first target agricultural product AP1 in the database 13. Next, the process proceeds to step S24.

[0052] In step S24, the reading unit 111 reads the first target production volume stored in association with the first target agricultural product AP1 from the database 13. Next, the process proceeds to step S25.

[0053] In step S25, the calculation unit 112 calculates a third reduction amount of the first target agricultural product AP1 based on the second reduction amount calculated in step S23 and the first target production amount read out in step S24. More specifically, the third reduction amount is calculated by dividing the second reduction amount by the first target production amount. The third reduction amount is stored in the database 13 in association with the first target agricultural product AP1. Thereafter, the first calculation process is terminated.

[0054] The third reduction amount can be used as a basis for calculating the environmental value V1 of the target agricultural product AP. Therefore, the emission reduction support system 1 can support the calculation of the environmental value V1.

[0055] 3, in step S14, the first calculation process is executed for the second target agricultural product AP2. The first calculation process is executed for the second target agricultural product AP2 in the same manner as in step S13. Therefore, a detailed description is omitted. Next, the process proceeds to step S15.

[0056] In step S15, the first calculation process is executed for the third target agricultural product AP3. The first calculation process is executed for the third target agricultural product AP3 in the same manner as in step S13. Therefore, a detailed description is omitted. Next, the process proceeds to step S16.

[0057] In step S16, the reading unit 111 reads out the target content amounts stored in association with the respective target agricultural products AP from the database 13. Next, the process proceeds to step S17.

[0058] In step S17, the calculation unit 112 calculates the greenhouse gas reduction amount per quantity of the lunch box P based on the third reduction amount of each target agricultural product AP acquired in steps S13 to S15 and the target content of each target agricultural product AP read out in step S16. The contribution of the first target agricultural product AP1 in the greenhouse gas reduction amount per quantity of the lunch box P is calculated by multiplying the third reduction amount of the first target agricultural product AP1 by the first target content. Similarly, the contribution of the second target agricultural product AP2 and the contribution of the third target agricultural product AP3 in the greenhouse gas reduction amount per quantity of the lunch box P are calculated. The contributions of each target agricultural product AP are added together to calculate the greenhouse gas reduction amount per quantity of the lunch box P. The fourth reduction amount can be used as a calculation basis for the environmental value V2 per quantity of the lunch box P. Therefore, the emission reduction support system 1 can support the calculation of the environmental value V2. In the calculation processes executed in step S17, step S23, and step S25, the units are adjusted as necessary. Next, the process proceeds to step S18.

[0059] In step S18, the printer 14 is caused to print on a label L1 the greenhouse gas reduction amount per quantity of lunches P calculated in step S17. The label L1 is affixed to the box of the lunches P. This makes it possible to effectively appeal to purchasers of the lunches P the results of the reduction in greenhouse gas emissions. This increases the demand for the lunches P, and also increases the demand for each target agricultural product AP. Furthermore, an incentive can be provided to each farmer F to use biochar B, which promotes the spread of biochar. After that, this process ends.

[0060] It is assumed that the target production volume will not be determined during the target period. In that case, for example, it may be considered to be the planned value of the target production volume for the target period. Therefore, if there is a surplus or shortfall between the planned value and the actual value of the target production volume at the end of the target period, the calculation process is performed again using the actual value of the target production volume. It is considered that the difference between the value based on the planned value and the value based on the actual value is calculated for the third reduction amount and the reduction amount of greenhouse gases per quantity of lunch box P, and the difference is offset through emissions trading.

[0061] Biochar B can also be produced using the residue R discharged from the production of lunches P as a raw material. In this case, for example, the residue R is supplied from lunch box manufacturer M to power company E, and processed into biochar B at biochar production facility 100.

[0062] According to the present embodiment described above in detail, the following effects can be obtained.

[0063] According to this embodiment, the reading unit 111 acquires a first reduction amount, which is the amount of greenhouse gas reduction per unit weight of biochar B, an application amount, which is the total weight of biochar B used on a unit area of ​​farmland N during a unit period, and a target production amount, which is the total weight of target agricultural product AP, which is agricultural product produced on the unit area of ​​farmland N during the unit period. The calculation unit 112 calculates a second reduction amount, which is the amount of greenhouse gas reduction per unit period in the unit area of ​​farmland N, based on the first reduction amount and the application amount, and calculates a third reduction amount, which is the amount of greenhouse gas reduction per unit weight of the target agricultural product AP, based on the second reduction amount and the target production amount.

[0064] Furthermore, the reading unit 111 acquires the target content, which is the weight of the target agricultural produce AP per quantity of the packed lunches P. The calculation unit 112 calculates the reduction amount of greenhouse gases per quantity of the packed lunches P based on the third reduction amount and the target content.

[0065] The third reduction amount can be used to calculate the environmental value V1 for each target agricultural product AP. The fourth reduction amount can be used to calculate the environmental value V2 for the target product P. Therefore, according to this embodiment, it is possible to support the calculation of environmental value. This makes it possible to more smoothly implement a business model that aims to promote the spread of biochar. Therefore, it is possible to contribute to the promotion of the spread of biochar.

[0066] In addition, because the contribution of Lunch P to the reduction of emissions can be visualized, it is possible to effectively appeal to the purchasers of Lunch P about its achievements in reducing greenhouse gas emissions. This increases the demand for Lunch P and also increases the demand for each of the target agricultural products AP. This provides each farmer F with an incentive to use biochar B, which promotes the spread of biochar.

[0067] According to the present embodiment, the lunch box P contains as ingredients a first target agricultural product AP1, a second target agricultural product AP2, and a third target agricultural product AP3, which are produced in different farmland N. The calculation unit 112 calculates the greenhouse gas reduction amount per quantity of the lunch box P based on the third reduction amount and target content for the first target agricultural product AP1, the third reduction amount and target content for the second target agricultural product AP2, and the third reduction amount and target content for the third target agricultural product AP3.

[0068] The target product may include multiple target agricultural products produced in different farmlands. However, according to the present embodiment, even for such a target product, such as a lunch box P, the greenhouse gas reduction amount per quantity of the target product can be calculated.

[0069] According to this embodiment, biochar B is produced using residue R discharged during the production of lunch boxes P as a raw material.

[0070] This allows the valve operator M to reduce greenhouse gas emissions, for example, compared to disposing of the residue R by normal incineration.

[0071] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate.

[0072] The business model to which the emission reduction support system 1 is applied is not limited to that of the above embodiment. Below, an example in which the emission reduction support system 1 is applied to a business model according to another example will be described with reference to FIG. 5. FIG. 5 is a system configuration diagram illustrating an example of the overall configuration of the emission reduction support system 1 applied to a business model according to another example. Below, differences from the above embodiment will be mainly described, and configurations similar to those in the above embodiment will be denoted by the same reference numerals and descriptions thereof may be omitted.

[0073] As shown in FIG. 5, the lunches P may be sold directly from the lunch provider M to the consumer C2. Each target agricultural product AP may be provided directly by each farmer F to the lunch provider M without going through the electric power company E. Also, each target agricultural product AP may be sold directly to the consumer C2 by each farmer F, in addition to being sold to the electric power company E or the lunch provider M. The consumer C2 may be an organization such as a company, or an individual consumer. In this case, it is possible to realize a business model that promotes the spread of biochar with less involvement from the electric power company E.

[0074] In this case, the emission reduction support system 1 may include a printer 31 and a printer 32.

[0075] The printer 31 is used, for example, by the bento supplier M. The printer 31 is connected to and controlled by the information terminal 21C. The reduction amount calculation device 10 transmits the calculation result of the calculation unit 112 to the information terminal 21C, and more specifically, transmits the amount of greenhouse gas reduction per quantity of packed lunches P. The information terminal 21C causes the printer 31 to print a label L2 indicating the amount of greenhouse gas reduction per quantity of packed lunches P transmitted by the reduction amount calculation device 10. The label L2 is affixed to the container of the packed lunches P. This makes it possible to visualize the contribution of the packed lunches P to emission reduction, and therefore the bento supplier M can suitably appeal to the consumer C2 about the results of the emission reduction.

[0076] The printer 32 is used, for example, by the second farmer F2. The printer 32 is connected to the information terminal 21B and is controlled by the information terminal 21B. The reduction amount calculation device 10 transmits the calculation result of the calculation unit 112 to the information terminal 21B, and more specifically, transmits the third reduction amount of the third target agricultural product AP3. The information terminal 21B causes the printer 32 to print a label L3 indicating the third reduction amount of the third target agricultural product AP3. The label L3 is attached, for example, to a bag containing the third target agricultural product AP3. This makes it possible to visualize the contribution of the third target agricultural product AP3 to emission reduction, and therefore the second farmer F2 can suitably appeal to the consumer C2 about the results of the greenhouse gas emission reduction. In this case, the third target agricultural product AP3 also corresponds to the target product.

[0077] The reduction amount calculation device 10 may also be configured to transmit the second reduction amount to the information terminal 21C. This allows the second farmer F2 to know the amount of greenhouse gas emissions that have been reduced by the third farmland N3. The second reduction amount may also be printed on the label L3. This also allows the second farmer F2 to appeal to the consumer C2 about his / her contribution to reducing greenhouse gas emissions.

[0078] Note that the printers 31, 32 are not essential components. For example, the reduction amount calculation device 10 may display the results calculated by the calculation unit 112 on the information terminals 21A, 21B. Even in this case, the second farmer F2 and the bento supplier M can use the information provided by the reduction amount calculation device 10 as appropriate.

[0079] In the above embodiment, the target agricultural products AP were spinach, cabbage, and bell pepper, but the type of target agricultural product is not particularly limited. The target agricultural products are not limited to those with a one-year planting interval. Agricultural products may be planted multiple times during one unit period. Biochar does not need to be applied to farmland every time planting is performed, and may be applied, for example, every other time.

[0080] There are no particular limitations on the subject product, so long as it is made using the subject agricultural produce as a raw material. For example, the subject product may be food served at a restaurant. There are also no particular limitations on the subject agricultural produce. Furthermore, the subject product is not limited to food, and may be, for example, clothing manufactured using cotton as a subject agricultural produce, or biofuel manufactured using sugarcane as a subject agricultural produce.

[0081] In the above embodiment, the reduction amount calculation device 10 has the database 13, but the database 13 is not an essential component of the reduction amount calculation device. Information necessary for the calculation process may be stored in a database on the cloud, for example. In that case, the reduction amount calculation device 10 (reading unit 111) accesses the database on the cloud via the communication unit 16 and reads out the information necessary for the calculation process from the database on the cloud. In this configuration, the reading unit 111 and the communication unit 16 correspond to an acquisition unit.

[0082] In the above embodiment, the target for displaying the calculation result of the reduction amount calculation device 10 (calculation unit 112) was the label attached to the target product, but this is not particularly limited. The calculation result of the reduction amount calculation device 10 (calculation unit 112) may be displayed directly on the container of the target product, or may be displayed on a menu listing the food and drink as the target product. [Explanation of symbols]

[0083] 10 Reduction amount calculation device 111 Reading section (acquisition section) 112 Calculation section AP target agricultural products AP1 First target agricultural product AP2 Secondary target agricultural products AP3 Third target agricultural product N Farmland N1 First Farm N2 Farmland No. 2 N3 Third Farm P Bento (target product) R residue

Claims

1. an acquisition unit that acquires a first reduction amount, which is a reduction amount of greenhouse gases per unit weight of biochar, an application amount, which is a total weight of the biochar used in a unit area of ​​farmland during a unit period, and a target production amount, which is a total weight of target agricultural products that are agricultural products produced in the unit area of ​​the farmland during the unit period; a calculation unit that calculates a second reduction amount, which is the amount of greenhouse gas reduction in the unit area of ​​the farmland per unit period, based on the first reduction amount and the application amount, and calculates a third reduction amount, which is the amount of greenhouse gas reduction per unit weight of the target agricultural product, based on the second reduction amount and the target production amount; A greenhouse gas reduction calculation device comprising:

2. When a product containing the above-mentioned target agricultural products as an ingredient is considered a target product, The acquisition unit acquires a target content, which is a weight of the target agricultural produce per quantity of the target product, The greenhouse gas reduction amount calculation device according to claim 1 , wherein the calculation unit calculates the greenhouse gas reduction amount per quantity of the target product based on the third reduction amount and the target content amount.

3. The greenhouse gas reduction calculation device of claim 2, wherein the calculation unit calculates the greenhouse gas reduction amount per quantity of the target product based on the third reduction amount and the target content for each target agricultural product when the target product contains multiple target agricultural products produced on different agricultural lands as raw materials.

4. The greenhouse gas reduction amount calculation device according to claim 2 or 3, wherein the biochar is produced using a residue discharged during the production of the target product as a raw material.

5. A calculation method executed by an information processing device, A first acquisition step of acquiring a first reduction amount, which is a reduction amount of greenhouse gas per unit weight of biochar, an application amount, which is a total weight of the biochar used on a unit area of ​​farmland during a unit period, and a target production amount, which is a total weight of target agricultural products that are agricultural products produced on the unit area of ​​farmland during the unit period; a first calculation step of calculating a second reduction amount, which is the amount of greenhouse gas reduction in the unit area of ​​the farmland per unit period, based on the first reduction amount and the application amount, and calculating a third reduction amount, which is the amount of greenhouse gas reduction per unit weight of the farm product, based on the second reduction amount and the target production amount; A method for calculating greenhouse gas reductions comprising:

6. When a product containing the above-mentioned target agricultural products as an ingredient is considered a target product, A second obtaining step of obtaining a target content, which is a weight of the target produce per quantity of the target product; A second calculation step of calculating a reduction amount of greenhouse gas per quantity of the target product based on the third reduction amount and the target content; The method for calculating a greenhouse gas reduction amount according to claim 5 , comprising:

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