In geologic time aren’t current temperatures at record lows? If so isn’t more co2 in the atmosphere protective against further temperature drops
No, and no. We’re living through a warming that has taken 2 million years to get to this point. The amount of CO2 in the atmosphere is in the few hundreds of parts per million, it has no vast impact on the climate of the Earth. And the climate is 100% natural 100% of the time.