There is no cause-effect between CO2 and temp over the long history of the Earth. There was an Ice Age when CO2 was 5,000 ppm.

Doubling CO2 would greatly increase food production and would have a negligible effect on temperature. There is no cause-effect between CO2 and temp over the long history of the Earth. There was an Ice Age when CO2 was 5,000 ppm. pic.twitter.com/uBag5LM3FN

— Patrick Moore (@EcoSenseNow) February 1, 2024