Global warming: in the realm of 400 ppm atmospheric CO2 March 24, 2015 Coyote Gulch Uncategorized Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading...