"TIME" Magazine, 'Special Report: Global Warming', Canadian Edition, April 3, 2006
"During the last ice age, the atmosphere's CO2 concentration was just 180 p.p.m., putting Earth into a deep freeze. After the glaciers retreated but before the dawn of the modern era, the total had risen to a comfortable 280 p.p.m. In just the past century and a
(
Read more... )