May 13, 2019, 12:20 p.m. by Russell McLendon
Earth's atmosphere hasn't had this much CO2 in human history, and possibly not since the Pliocene Epoch about 3 million years ago.
About our US state tag cloud
June 11, 2009, 9:20 a.m.
How we determine our top 10 states
Arctic people hit with pollution from half a world away
June 10, 2009, 5:10 p.m. by S.A. Rogers
Pollution is blown in the wind from the point of origin to the Arctic, falling in the form of rain and snow.
Should residents of Hurricane Highway islands keep rebuilding?
June 3, 2009, 1:46 p.m. by S.A. Rogers
Some question whether such intensive use of resources is really a smart idea.
Generals, admirals say climate change a matter of national security
May 20, 2009, 12 p.m. by S.A. Rogers
Failure to act on climate change leaves us vulnerable to attack, says new report.
Video: Chris Matthews debates global warming denying politician
May 20, 2009, 10:42 a.m.
MSNBC's Chris Matthews speaks with Rep. Dana Rohrabacher (R-California) about why he doesn't believe in climate change.
Video: Jon Stewart interviews EPA chief
May 19, 2009, 9:12 p.m.
Jon Stewart interviews Lisa P. Jackson, the head of the Environmental Protection Agency.
CO2 101: Why is carbon dioxide bad?
Fulgurites: When lightning strikes sand, magic is formed
What is cloud seeding, and does it really work?
Norway's melting ice is revealing priceless ancient artifacts
Why does my grass look greener after it rains?
These 8 sinking cities are most at risk of being swallowed by rising seas