Actually, I am counting on technology to solve the problem artificially.

We are nowhere close to being able to control our environment, yet. But I think by the end of the 21st century, we will be forced to do develop and implement CO2 atmospheric scrubbers that will remove and sequester CO2 on a HUGE scale.

IIRC, that was prophesied in Seaquest, DSV, after we had killed the oceans.