Probably something that uses tamper-proof hardware and blockchain tech to have a trustless ledger of pollution from the source, so that negative externalities o

Probably something that uses tamper-proof hardware and blockchain tech to have a trustless ledger of pollution from the source, so that negative externalities of pollution can be properly attributed to their makers/sources. We need to have the cost of pollution properly factored in to the price of things, to the taxes individuals pay, etc... so that they are offset.