> Couldn't we have planted forests, from which we take the grown trees and put them back down under the earth, in some old mining facilities or dig some tunnels that lead deep down and put that stuff there?
This is basically how coal was created in the first place.
Assuming carbon in = carbon out, we'd have to plant trees for millions of years on virtually all arable land and bury them underground to undo our burning of coal, since that's how the coal (which is almost pure carbon) was originally created.
This is basically how coal was created in the first place.
https://en.wikipedia.org/wiki/Coal_forest
Assuming carbon in = carbon out, we'd have to plant trees for millions of years on virtually all arable land and bury them underground to undo our burning of coal, since that's how the coal (which is almost pure carbon) was originally created.