I was also thinking like you the first time i saw this project but when i read the whitepaper i came to understand what it is all about. Earth Token is a platform that connects natural asset developer and consumers. Natural asset developers will register their products to the platform and then comsumers will register to buy the listed products of natural assets Earth Token has.  Yes i think somewhere in the whitepaper they talked about the treated fuels by the Impact Choice that emits reduced carbon.