CO2 has passed critical threshold point

We have reached CO2 levels that compromise the stability of the polar ice sheets.

NVDL: It may sound obvious, but the implications of the obvious are important to consider, and require an immediate, comprehensive response.

clipped from www.sciencedaily.com The authors, who include two Yale scientists, assert that to maintain a planet similar to that on which civilization developed, an optimum CO2 level would be less than 350 ppm — a dramatic change from most previous studies, which suggested a danger level for CO2 is likely to be 450 ppm or higher. Atmospheric CO2 is currently 385 parts per million (ppm) and is increasing by about 2 ppm each year from the burning of fossil fuels (coal, oil, and gas) and from the burning of forests.