Monday~Plants & CO2

“We’ve all heard the claim that excess CO2 is good for plants by nonscientific idiots when — like the ones in Congress — addressing global warming/climate change. What exactly represents the “excess” when it become toxic to the plants themselves? At approximately 415 ppm we are at the threshold where plants become stressed from excess CO2 and heat as industrial activity continues to pump millions of tons of CO2 into the atmosphere annually. Or simply put we are at the threshold of massive crop failures and the famines resulting from crop loss will be staggering.