Evolution takes a lot longer than 1000 years to affect fundamental processes like photosynthesis, which is an ancient biological chemical reaction. Plants exper

Evolution takes a lot longer than 1000 years to affect fundamental processes like photosynthesis, which is an ancient biological chemical reaction. Plants experienced thousands of ppm of CO2 and warmer temperatures for most of Earth's 1 billion plus year history. The fossil fuels that are being burned, the carbon that is being burned, is dead plant matter from millions of years ago, when CO2 was thousands of ppm.