[graemep]

Most emitted CO2 also remains in the carbon cycle.

What matters is accumulation at a particular point in the cycle because CO₂ is added to the atmosphere faster than it is removed. If it is removed faster then it ceases to be a problem.

[modo_mario]

I'm not sure what you're trying to say here. It seems to me the first and last line don't really add anything and I don't see why the middle sentence is necessarily true.