There can be many ways of using blockchain in sustainability, including public and consortium blockchain platforms. Examples might be:
1. using consortium blockchains for supply chain modelling to aggregate environmental properties of different products, like greenhause gas emission parameters.
2. using public tokens and public chains to encourage the P2P usage of environment friendly technologies, like green energy.
3. Gamification badges and collectable tokens: customers could gain different kinds of a non-tradable tokens as badges for consuming and buying environment friendly resources. It is similar to standard gamification
4. Locally tradable tokens: The gained tokens could be tradable but only in a local environment. As an example, tokens gained for consuming local “green” environmental goods could be used for purchasing other similar goods of local companies.
5. Full scale “green” cryptocurrency: The gained motivation or gamification token could work as a cryptocurrency having the possibility to be traded against other crypto or standard currencies.
6. “Green” markets: there could be tokens that represent directly some kind of a direct environment improvement. Examples might range from planting a tree or explicitly reducing the CO2 emission of an area in terms of a negative carbon credit. These tokens could be tradable on an open decentralized market, perhaps with standard cryptocurrencies.
7. “Green” transaction fee: The previously mentioned possibilities could be combined with the help of a special transaction fee on either standard payment transactions or cryptocurrencies. This “green” transaction fee can be automatically and transparently redirected to activities supporting sustainability.
