[WalterBright]

Sorry, that's just verbal sleight of hand. There's no such thing as "green" CO2.

[shmeeed]

Yes there is. I used to fall for the same lie, but it's just not true. It's a question of system boundaries.

Green CO2 was recently (in geological terms) captured from the atmosphere into biomass, that's why its release is basically net zero.

Fossil CO2 hasn't been part of the atmosphere in eons (back in e.g. the Crustacean, the CO2 ratio was many times higher), so its release is additive.

[WalterBright]

So bury the trees. Or run them through the sawmill and build houses.

[jeffbee]

How do you justify exhaling then?

[Joker_vD]

Well, you don't. Everything you do has a carbon footprint, you know, haven't you heard? Everything.

[antonvs]

Have you always had difficulty with abstraction?