[pjc50]

> This assumes that we can trustlessly get the CO2 emissions for all countries

Classic blockchain advocacy: it works great provided we solve this unsolved problem of communicating "trustlessly" with the real world!

> you'd have actual enforceable code that can not be gamed

People keep "gaming" smart contracts all the time. Just recently there was a defi attack where someone simply flash-borrowed all the tokens, voted themselves a reward, and returned the tokens.

[cburgdorf]

There are a lot of well proven live projects that use external oracle data and haven't suffered any serious issues. Just throwing DAI and RAI out as examples.