Carbon credit transaction system, carbon credit transaction method, and program

Abstract

To provide a carbon credit transaction system, method, and program for promoting a carbon offset regime by allowing a general consumer to obtain a right of possession of a carbon credit by a market price.SOLUTION: In a system where a server communicates with a plurality of consumer side communication terminals, a plurality of company side communication terminals, and a carbon credit management computer of a government via the Internet, a server 10 includes: a purchase amount grasping unit for grasping a purchase amount of a commodity or service which has been purchased by a consumer from a company or a municipality; an incentive granting unit which grants, to the consumer, an incentive calculated according to the purchase amount grasped by the purchase amount grasping unit and with a prescribed incentive rate; a transfer unit which transfers, to the consumer, the right of possession of the carbon credit on the basis of the incentive corresponding to the market price of the carbon credit; and a market price display unit which displays, to the consumer side communication terminal, the number of possessions of the carbon credit and the market price for each consumer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a carbon credit trading system, a carbon credit trading method, and a program that promote greenhouse gas reduction by having ordinary consumers participate in a government-promoted carbon offset project. [Background technology]

[0002] The government is promoting an emissions trading business in which holders of emissions rights sell carbon credits such as J-Credits to companies that generate greenhouse gases, thereby obtaining operating expenses to expand and maintain their emissions rights, and companies that generate greenhouse gases purchase carbon credits to achieve carbon offsets.

[0003] In order for forests to effectively absorb CO2, forest owners must continue the forestry cycle of planting, mowing, thinning, etc. over many years, and it is desirable for them to be able to obtain appropriate funding for this operation.

[0004] Patent Document 1 describes a configuration in which, when paying for goods or services, the customer is asked whether or not to participate in carbon offsetting, and if the customer chooses to participate, the value of carbon credits such as J-Credits is calculated and that value is collected in addition to the payment amount. [Prior art documents] [Patent documents]

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2022-150704 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the scheme described in Patent Document 1 has the problem that it is rare for ordinary consumers to be motivated to purchase carbon credits when paying for goods or services, and therefore it is not expected to help holders of emission rights cover operating costs or promote the carbon offset system.

[0007] The present invention aims to solve the above problems and promote the carbon offset system by making it possible for ordinary consumers to transfer ownership of carbon credits at market prices and to offset carbon emissions in their daily lives. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a carbon credit trading system in which general consumers can participate, a consumer-side communication terminal held by the consumer; a server owned by a carbon credit holder and communicating with the consumer-side communication terminal; The server a purchase amount grasping unit for grasping the purchase amount of a product or service purchased by the consumer from a company or a local government; an incentive granting unit that grants an incentive to the consumer, the incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers ownership of the carbon credits to the consumer in exchange for the incentive equivalent to the market price of the carbon credits; a market price display unit that displays the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; The present invention provides a carbon credit trading system characterized by having the above.

[0009] This structure allows ordinary consumers to acquire ownership rights to carbon credits at market prices, giving them the potential to build assets in a manner similar to stock trading, while also raising awareness among ordinary consumers about reducing CO2 emissions and promoting the carbon offset system.

[0010] In the carbon credit trading system, the server may be configured to include a carbon offset unit that performs carbon offsetting based on the carbon credits held by the consumer through operation from the consumer-side communication terminal.

[0011] This configuration allows ordinary consumers to perform carbon offsetting with simple operations, contributing to CO2 reduction and promoting the carbon offset system.

[0012] The carbon credit trading system may be configured to include a CO2 reduction effect display unit that displays, on the consumer-side communication terminal, the CO2 reduction effect achieved by the carbon credits to which the consumer has ownership rights.

[0013] This structure will convey the effect of CO2 reduction to general consumers, and it is expected that they will further support the carbon offset system and purchase more products or services from the company or local government.

[0014] In order to solve the above problems, the present invention provides a carbon credit trading method in which general consumers can participate, comprising: a consumer-side communication terminal held by the consumer; a server owned by a carbon credit holder and communicating with the consumer-side communication terminal; The server a purchase amount ascertaining step of ascertaining the purchase amount of the goods or services purchased by the consumer from a company or a local government; an incentive granting step of granting to the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped in the purchase amount grasping step; a transfer step of transferring ownership of the carbon credits to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credits calculated based on market prices; a market price display step of displaying the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; The present invention provides a carbon credit trading method characterized by comprising the steps of:

[0015] This structure allows ordinary consumers to acquire ownership rights to carbon credits at market prices, giving them the potential to build assets in a manner similar to stock trading, while also raising awareness among ordinary consumers about reducing CO2 emissions and promoting the carbon offset system.

[0016] The carbon credit trading method may further comprise a CO2 reduction effect display step of displaying on the consumer-side communication terminal the CO2 reduction effect achieved by the carbon credits to which the consumer has ownership.

[0017] This structure will convey the effect of CO2 reduction to general consumers, and it is expected that they will further support the carbon offset system and purchase more products or services from the company or local government.

[0018] Furthermore, in order to solve the above-mentioned problems, the present invention provides a program for a carbon credit trading system in which general consumers can trade carbon credits, comprising: a purchase amount grasping unit that grasps the purchase amount of goods or services purchased by the consumer from a company or local government; an incentive granting unit that grants the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers carbon credit ownership rights to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credit calculated based on the market price; and a market price display unit that displays the number of carbon credit ownership rights and market price for each consumer on the consumer's communication terminal.

[0019] This structure allows ordinary consumers to acquire ownership rights to carbon credits at market prices, giving them the potential to build assets in a manner similar to stock trading, while also raising awareness among ordinary consumers about reducing CO2 emissions and promoting the carbon offset system.

[0020] The program may be configured to include a CO2 reduction effect display unit that displays, on the consumer-side communication terminal, the CO2 reduction effect achieved by the carbon credits to which the consumer has ownership.

[0021] This structure will convey the effect of CO2 reduction to general consumers, and it is expected that they will further support the carbon offset system and purchase more products or services from the company or local government. [Effects of the Invention]

[0022] The carbon credit trading system, carbon credit trading method, and program of the present invention can promote the carbon offset system by enabling ordinary consumers to transfer ownership rights to carbon credits at market prices and to offset carbon emissions. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a carbon credit trading system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating a program according to the first embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating a carbon credit trading method according to a first embodiment of the present invention. [Figure 4] FIG. 2 is a diagram illustrating an example of a display of a CO2 reduction effect in the first embodiment of the present invention. [Figure 5] FIG. 10 is a diagram illustrating an example of a carbon offset operation screen in the first embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating an example of a display of a contribution ranking for carbon offset in the first embodiment of the present invention. [Figure 7] FIG. 1 is a diagram illustrating an example of displaying carbon offset contributions by companies and the like in the first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0024] A carbon credit trading system, a carbon credit trading method, and a program according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a diagram illustrating the configuration of a carbon credit trading system according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a program according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a carbon credit trading method according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a display of CO2 reduction effects according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating an example of a carbon offset operation screen according to the first embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a display of contribution rankings for carbon offset according to the first embodiment of the present invention. FIG. 7 is a diagram illustrating an example of displaying the carbon offset contributions of companies, etc. according to the first embodiment of the present invention.

[0025] (Carbon Credit Trading System) As shown in Fig. 1, a carbon credit trading system 100 in a first embodiment of the present invention includes consumer-side communication terminals 20 (20a, 20b, 20c) such as mobile phones, smartphones, tablets, or personal computers owned by ordinary consumers, enterprise-side communication terminals 30 (30a, 30b, 30c) such as mobile phones, smartphones, tablets, or personal computers owned by businesses or local governments, and a server 10 owned by carbon credit holders such as forest owners, wind power generation businesses, or solar power generation businesses, which communicates with consumer-side communication terminals 20 and enterprise-side communication terminals 30 via the Internet. In addition, carbon credits can be bought and sold or carbon offset applications can be made via a J-Credit Registry system or the like in a government carbon credit management computer 40.

[0026] In the first embodiment, the server 10 is configured to communicate with the consumer communication terminal 20, the business communication terminal 30, and the government carbon credit management computer 40 via the Internet, but this is not necessarily limited to this and can be modified as appropriate. For example, communication may be performed via wired communication such as a telephone line or wireless communication such as a transceiver. Furthermore, although the server 10 is configured to include the business communication terminal 30 and the government carbon credit management computer 40, this is not necessarily required and may not be included.

[0027] The server 10 has a configuration as shown in Fig. 2, which is configured by a computer program. That is, it has a purchase amount grasping unit 11 that grasps the purchase amount of a product or service purchased by an ordinary consumer from a company or a local government, an incentive granting unit 12 that grants an incentive to the consumer calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit 11, and a carbon credit granting unit 15 that grants carbon credits calculated based on a predetermined grant rate for the purchase amount to the company or local government from which the consumer purchased the product or service.

[0028] In this application, an incentive is something given to a general consumer according to the purchase amount of a product or service purchased from a company or local government, and it stimulates or motivates the consumer to make further purchases in the future. Specifically, it is points, discount coupons, upgrade services, etc. that can be used as compensation for acquiring carbon credits.

[0029] The server 10 also has a CO2 reduction effect display unit 13 that displays on the consumer's communication terminal 20 the CO2 reduction effect of the carbon credits granted to the company or local government based on the purchase amount, and the CO2 reduction effect of the carbon credits that the consumer holds ownership of through the carbon credit transfer described below, a carbon credit operating expense grant unit 16 that grants operating expenses calculated based on a predetermined operating rate to the purchase amount as carbon credit operating expenses to the carbon credit holder, and a company information display unit 14 that displays basic information, sales information, or event information about the company or local government on the consumer's communication terminal 20.

[0030] The system also has a transfer unit 17 that transfers carbon credits based on the market price in exchange for incentives held by general consumers, and a market price display unit 18 that displays the market price of carbon credits on the consumer's communication terminal 20. When the transfer unit 17 transfers carbon credits to the consumer, a carbon credit operating fee grant unit 16 grants an operating fee calculated based on a predetermined operating rate to the market price as a carbon credit operating fee to the carbon credit holder. This allows general consumers to obtain carbon credits without having to hold a government carbon credit account.

[0031] In the first embodiment, carbon credits are transferred in exchange for incentives held by general consumers, but this is not necessarily limited to this and can be modified as appropriate. For example, carbon credits may be transferred to consumers in cash based on the market price. Furthermore, carbon credits may be transferred in exchange for cash or incentives not only to general consumers but also to companies or local governments that do not have government carbon credit accounts. This allows consumers or companies that do not have government carbon credit accounts to hold carbon credits.

[0032] The company information display unit 14 and the carbon credit grant unit 15 are not necessarily required and may not be provided.

[0033] Carbon credits acquired by general consumers are managed for each consumer in the server 10. General consumers can then convert their carbon credits into cash at the market price. In this case, the carbon credit operating expense granting unit 16 grants the carbon credit holder an operating expense calculated based on a predetermined operating rate relative to the converted amount as a carbon credit operating expense. This allows the carbon credit holder to receive operating expenses, and consumers can invest their own funds in the same way as with stocks, etc. It is also possible for general consumers to exchange their carbon credits for incentives at the market price.

[0034] The server 10 also has a carbon offset unit 19. The carbon offset unit 19 can accept carbon offsets from consumers who do not have a government carbon credit account. After determining the amount of carbon credits to be offset, consumers can offset their carbon by pressing the carbon offset button on the consumer-side communication terminal 20. At this time, the server 10 secures the carbon credits that have been carbon offset as the carbon credit holder's own CO2 emission rights.

[0035] This will enable consumers who do not have a government carbon credit account to offset their carbon emissions, raising awareness among consumers and strongly promoting the carbon offset system. Furthermore, companies and local governments that do not have a government carbon credit account can also offset their carbon emissions.

[0036] In addition, in order to show the effect of carbon offsetting by the carbon offset unit 19, a carbon offset contribution ranking as shown in Figure 6 or the carbon offset contribution of specific companies, etc. as shown in Figure 7 can be displayed on the consumer's communication terminal 20.

[0037] The purchase amount grasping unit 11, incentive granting unit 12, CO2 reduction effect display unit 13, company information display unit 14, carbon credit granting unit 15, carbon credit operating expense granting unit 16, transfer unit 17, market price display unit 18, and carbon offset unit 19 in the server 10 are configured as web application programs.

[0038] In the first embodiment, the purchase amount grasping unit 11, incentive granting unit 12, CO2 reduction effect display unit 13, company information display unit 14, carbon credit granting unit 15, carbon credit operating expense granting unit 16, transfer unit 17, market price display unit 18, and carbon offset unit 19 in the server 10 are configured as web application programs, but are not necessarily limited to this and can be modified as appropriate. For example, they may be configured as application programs in the consumer communication terminal 20 and the company communication terminal 30.

[0039] (Carbon Credit Trading Method) A carbon credit trading method will be described with reference to Fig. 3. A carbon credit holder such as a forest owner first invites businesses and local governments, which are carbon credit purchasers such as shops, convenience stores, supermarkets, and gas stations, to join their own business network, and prepares an environment in which the server 10 can communicate with the business side communication terminal 30. Keep it ready.

[0040] In addition, the consumer joins a business network led by carbon credit holders and prepares an environment in which the server 10 can communicate with the consumer-side communication terminal 20 .

[0041] A company or local government that has joined the business network carries out a company information display step 61 in which the company communication terminal 30 notifies the server 10 of company information that may be of interest to consumers, such as basic information about the company or local government, coupon information, or sales information. The server 10 displays the received company information on the consumer communication terminal 20 of the consumer that has joined the business network. It may also display information showing the carbon offset contribution, which will be described later, as shown in FIG. 7.

[0042] In the first embodiment, the company information display step 61 is performed to display the company information on the consumer communication terminal 20 of the consumer who has joined the business network, but this is not necessarily limited to this and can be modified as appropriate. For example, the company information may be introduced by mailing direct mail without performing the company information display step 61.

[0043] A consumer who receives basic information, coupon information, or sale information from a company or local government purchases a product or service from a company or local government, such as a supermarket, that catches their interest. The company-side communication terminal 30 or the consumer-side communication terminal 20 then notifies the server 10 of the purchase price of the product or service, and the server 10 determines the purchase price in a purchase price determination step 62. The determined purchase price may include or exclude consumption tax. Alternatively, the company or local government may decide whether the price includes or excludes consumption tax.

[0044] Next, an incentive and carbon credit granting process 63 is carried out in which an incentive calculated based on a predetermined incentive rate is granted to the consumer in relation to the determined purchase amount, and carbon credits calculated based on a predetermined grant rate are granted to the company or local government.

[0045] In Example 1, the incentive is points, and the incentive rate is 1% of the purchase price. In other words, 1% of the purchase price is awarded as points. These points can be exchanged for coupons, discount vouchers, products, carbon credits, etc. issued by all companies and local governments that are members of the business network led by the carbon credit holder that manages the server 10, and can also be used as consideration for acquiring carbon credits, as will be described later. The awarded points are displayed on the consumer's communication terminal 20.

[0046] In the first embodiment, points are awarded as an incentive, but this is not necessarily limited to this and can be changed as appropriate. For example, carbon credit purchase tickets, discount coupons, or upgrade services may be directly awarded, and any incentive that provides an incentive to the consumer may be awarded.

[0047] Furthermore, carbon credits calculated based on a predetermined rate are awarded to the company or local government for the determined purchase amount. In Example 1, the rate is set to 0.01% of the purchase amount. By accumulating these awarded carbon credits, the company or local government can offset its own CO2 emissions.

[0048] Then, a CO2 reduction effect display step 64 is carried out, in which the CO2 reduction effect of the carbon credits granted to the company or local government based on the purchase amount, and the CO2 reduction effect of the carbon credits held by the consumer (described below), are displayed on the consumer's communication terminal 20. The CO2 reduction effect display can also be a cumulative display, an example of which is shown in Figure 4. The example in Figure 4 shows that a cumulative contribution has been made equivalent to a CO2 reduction effect of 1,527 tons. By seeing this display, consumers can recognize that they are contributing to the carbon offset system, which is expected to lead to further purchasing motivation.

[0049] In the first embodiment, the CO2 reduction effect display step 64 is performed, but the present invention is not limited to this and can be modified as appropriate. For example, the CO2 reduction effect display step 64 does not have to be performed, and direct mail may be sent to introduce the fact that a contribution equivalent to the CO2 reduction effect has been made.

[0050] In addition, in Example 1, the incentive rate is 1% of the purchase price, and the carbon credit grant rate is 0.01% of the purchase price, but this is not necessarily limited to this and can be changed as appropriate. For example, the incentive rate may be 2% of the purchase price, and the carbon credit grant rate may be 0.05% of the purchase price, and any incentive rate and grant rate can be set.

[0051] In the transfer step 65, the ownership rights of the carbon credits can be transferred in exchange for an incentive equivalent to the assessed value of the carbon credits calculated based on the market price. At this time, the operating costs calculated based on a predetermined operating ratio are granted to the carbon credit holder as the carbon credit operating costs for the transfer price of the transferred carbon credits. This allows consumers to obtain carbon credits without having to hold a government carbon credit account, and also allows the carbon credit holder to receive the predetermined operating costs.

[0052] A market price display step 66 is carried out in which the market price of carbon credits is obtained from the Tokyo Stock Exchange or the like and displayed on the consumer side communication terminal 20 or the company side communication terminal 30. This allows consumers or companies, etc., to know the market price of at least the closing price on the previous day, and enables them to decide whether to cash out.

[0053] Furthermore, a carbon offset step 67 can be carried out. The carbon offset step 67 accepts carbon offsets from consumers who do not have a government carbon credit account. After deciding the amount of carbon credits to be offset, the consumer fills in the necessary information on the consumer-side communication terminal 20 shown in FIG. 5 and presses the "carbon offset application" button, which causes the server 10 to carry out the carbon offset step 67. As a result, the carbon credit holder secures the carbon-offset carbon credits as their own CO2 emission rights.

[0054] This will enable consumers who do not have a government carbon credit account to offset their carbon emissions, raising awareness among consumers and strongly promoting the carbon offset system. Furthermore, companies and local governments that do not have a government carbon credit account can also offset their carbon emissions.

[0055] In addition, in order to show the effect of carbon offsetting through the carbon offset process 67, a carbon offset contribution ranking as shown in Figure 6 or the carbon offset contribution of specific companies, etc. as shown in Figure 7 can be displayed on the consumer's communication terminal 20.

[0056] In the first embodiment, the carbon offset step 67 is performed, but the present invention is not limited to this and can be modified as appropriate. For example, the carbon offset step 67 does not have to be performed.

[0057] Thus, in Example 1, there is provided a carbon credit trading system in which ordinary consumers can participate, comprising: a consumer-side communication terminal owned by the consumer; and a server owned by a carbon credit holder that communicates with the consumer-side communication terminal, wherein the server has: a purchase amount grasping unit that grasps the purchase amount of goods or services that the consumer purchased from a company or local government; an incentive granting unit that grants the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers carbon credit ownership rights to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credit calculated based on the market price; and a market price display unit that displays the number of carbon credit ownership rights and market price for each consumer on the consumer-side communication terminal. This carbon credit trading system allows ordinary consumers to acquire carbon credit ownership rights at market prices, which gives them the potential to build assets in the same way as stock trading, and also raises awareness of CO2 reduction among ordinary consumers, thereby promoting the carbon offset system.

[0058] In addition, in the first embodiment, a carbon credit trading method in which general consumers can participate is provided, a consumer-side communication terminal held by the consumer; a server owned by a carbon credit holder and communicating with the consumer-side communication terminal; The server a purchase amount ascertaining step of ascertaining the purchase amount of the goods or services purchased by the consumer from a company or a local government; an incentive granting step of granting to the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped in the purchase amount grasping step; a transfer step of transferring ownership of the carbon credits to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credits calculated based on market prices; a market price display step of displaying the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; This carbon credit trading method allows ordinary consumers to acquire ownership rights to carbon credits at market prices, which gives consumers the possibility of asset formation in the same way as stock trading, and also raises awareness of CO2 reduction among ordinary consumers, thereby promoting the carbon offset system.

[0059] Furthermore, in Example 1, there is provided a program for a carbon credit trading system in which general consumers can trade carbon credits, the program comprising: a purchase amount grasping unit that grasps the purchase amount of goods or services that the consumer has purchased from a company or local government; an incentive granting unit that grants the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers carbon credit ownership rights to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credits calculated based on the market price; and a market price display unit that displays the number of carbon credit ownership rights and market price for each consumer on the consumer's communication terminal. This program allows general consumers to acquire carbon credit ownership rights at market prices, which gives them the potential for asset formation in the same way as stock trading, and also raises general consumers' awareness of CO2 reduction, thereby promoting the carbon offset system. [Industrial Applicability]

[0060] The carbon credit trading system, carbon credit trading method, and program of the present invention can be widely applied to the field of greenhouse gas emission trading. [Explanation of symbols]

[0061] 10: Server 12: Incentive granting unit 13: CO2 reduction effect display unit 14: Company information display unit 15: Carbon credit granting unit 16: Carbon credit operating cost granting unit 17: Transfer unit 18: Market price display unit 19: Carbon offset unit 20 (20a, 20b, 20c): Consumer side communication terminal 30 (30a, 30b, 30c): Company side communication terminal 40: Carbon credit management computer

Claims

1. A carbon credit trading system in which general consumers can participate, a consumer-side communication terminal held by the consumer; a server owned by a carbon credit holder and communicating with the consumer-side communication terminal; The server a purchase amount grasping unit for grasping the purchase amount of a product or service purchased by the consumer from a company or a local government; an incentive granting unit that grants an incentive to the consumer, the incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers ownership of the carbon credits to the consumer in exchange for the incentive equivalent to an assessed value of the carbon credits calculated based on a market price; a market price display unit that displays the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; A carbon credit trading system comprising:

2. The carbon credit trading system described in claim 1, characterized in that the server is equipped with a carbon offset unit that performs carbon offsetting based on the carbon credits held by the consumer through operation from the consumer-side communication terminal.

3. 2. The carbon credit trading system according to claim 1, further comprising a CO2 reduction effect display unit that displays, on the consumer-side communication terminal, the CO2 reduction effect achieved by the carbon credits to which the consumer has ownership.

4. A carbon credit trading method in which general consumers can participate, a consumer-side communication terminal held by the consumer; a server owned by a carbon credit holder and communicating with the consumer-side communication terminal; The server a purchase amount ascertaining step of ascertaining the purchase amount of the goods or services purchased by the consumer from a company or a local government; an incentive granting step of granting to the consumer an incentive calculated based on a predetermined incentive rate for the purchase amount grasped in the purchase amount grasping step; a transfer step of transferring ownership of the carbon credits to the consumer in exchange for the incentive equivalent to the assessed value of the carbon credits calculated based on market prices; a market price display step of displaying the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; A carbon credit trading method comprising:

5. 5. The carbon credit trading method according to claim 4, further comprising a CO2 reduction effect display step of displaying on the consumer-side communication terminal the CO2 reduction effect achieved by the carbon credits to which the consumer has ownership.

6. A program in a carbon credit trading system that allows general consumers to trade carbon credits, a purchase amount grasping unit for grasping the purchase amount of a product or service purchased by the consumer from a company or a local government; an incentive granting unit that grants an incentive to the consumer, the incentive calculated based on a predetermined incentive rate for the purchase amount grasped by the purchase amount grasping unit; a transfer unit that transfers ownership of the carbon credits to the consumer in exchange for the incentive equivalent to an assessed value of the carbon credits calculated based on a market price; a market price display unit that displays the number of carbon credits held and the market price for each consumer on the consumer-side communication terminal; A program characterized by comprising:

7. 7. The program according to claim 6, further comprising a CO2 reduction effect display unit that displays, on the consumer-side communication terminal, the CO2 reduction effect achieved by the carbon credits owned by the consumer.

Images