Something similar (but not quite the same) exists through sources like CCF ( https://www.cloudcarbonfootprint.org/ ) or Climatiq ( https://www.climatiq.io/docs/api-reference/computing ) thought I don't think anyone has anything built-in to Terraform or your editor, which would be neat.

Disclaimer: I work at Climatiq

There was an interesting page on the FinOps Foundation site about this https://www.finops.org/wg/sustainability/

There is a potential intersection, but that might have to go further down the roadmap

Usually CO2 emissions correspond to cloud costs. Optimize your cloud costs, you optimize your emissions.

This spiritual kin of the efficient market hypothesis mindset. But it's not like that, if you look at pricing at cloud provider regions and vs local electricity mix off Electricity Maps. (eg Ireland vs nordic countries)

If I may dare - that would be a novelty while this is something many would pay for.

If it's just a straightforward conversion, then sure...