We were close to the start of an extinction event. ~180 ppm is the minimum amount of CO2 that the planet needs for plant life to exist. We were below 300 ppm at one point. I think its around 450 ppm now. 1000-5000 ppm is ideal AFAIK. The climate doomers have it backwards.
Others say we are in need for more Co2... (that we are approaching dangerously low levels) Not sure which sides is closest to the truth...
We were close to the start of an extinction event. ~180 ppm is the minimum amount of CO2 that the planet needs for plant life to exist. We were below 300 ppm at one point. I think its around 450 ppm now. 1000-5000 ppm is ideal AFAIK. The climate doomers have it backwards.