The environment is inherently a global/singular/central problem, because there's only one planet. I think that's why it's natural that people seek centralised solution.
It remains to be seen if we can:
  • align incentives in government frameworks such that corruption by corporations is not possible,
  • develop a decentralised solution with a global and cohesive reach - this may, honestly, require a Bitcoin-level invention to be unveiled.
this territory is moderated