CO2 levels in the atmosphere is now above 400 ppm. This is the highest it's been in one million years, and maybe the highest in 25 million years.
http://climate.nasa.gov/400ppmquotes/
CO2 levels in the atmosphere is now above 400 ppm. This is the highest it's been in one million years, and maybe the highest in 25 million years.
http://climate.nasa.gov/400ppmquotes/