>>11073859>all the CO2 in the air againNot all. Plenty of that carbon enters the food chain and the carbon cycle.
Life in general is a pretty good carbon sink, so long as you don't burn millions of years of bio-accumulation in a century and a half and tip anything over.
You could also have tree farms where you harvest and replant them, then weigh down the logs and toss them into the ocean. Wood rots a lot more slowly under water, and you're creating more habitats for sea life.
I do agree that there are bigger contributors to the carbon cycle, but trees do their part too.