The fossil record shows that CO2 only rises in a natural ice-age – when then is less photosynthesis on the land and seas.
So CO2 levels rise, 4 years into a natural glaciation. The Jurassic had 3 ice-ages – with CO2 at 4 parts per million. It rose to 8ppm. Modern photosynthesis caps CO2 at 2ppm.
1 of the ice-ages lasted 650 million years. Chernobyl happened in 1984 – the year of Chernobyl. In a natural warming period: hence Global Warming.
The climate has been cooling since 1995. So the present NATURAL Climate Change, is Global Cooling – with average global CO2 at 2ppm.
Extra CO2 is converted back into active biomass, within 5 minutes. Donald Trump wants to burn more coal – more life on Earth. No climate effect – good man!