Why was the U.S. Air Force interested in studying atmospheric CO2 in the 1950s?
What information can be determined from glacial ice?
About when did the last ice age start?
How does the history of CO2 concentrations connect with average global temperatures?
how many more times does human activity contribute CO2 than do natural sources?
Why does the Pentagon (the U.S. military) care about climate change?
Who is the single largest user of energy in the U.S.?
