greenhouse gases global warming

It’s Not Just Burping Cows, But the Land Cleared for Them to Graze

--"We have met the enemy, and he is us," the comic-strip character Pogo said decades ago. A new analysis of last year's near-record temperatures in the United States suggests he was right.
Warming caused by human activity was the biggest factor in the high temperatures recorded in 2006, according to a report by researchers at the National Oceanic and Atmospheric Administration.
The analysis, released Tuesday, is being published in the September issue of Geophysical Research Letters, published by the American Geophysical Union.