Lubos Motl: "carbon dioxide's impact on Nature as a plant food is many orders of magnitude more important than the role of carbon dioxide as a greenhouse gas"

The Reference Frame: Why we should work hard to raise the CO2 concentration

Nowadays, we enjoy CO2 concentrations growing by 2 ppm i.e. 0.5% a year and this increase contributes a non-negligible part to the increasing efficiency of the agriculture. I hope that when people are forced to get used to the dropping CO2, they will either find a way to mitigate this unwelcome evolution – e.g. by burning lots of biomass or something else – or they will have some other tricks.