Lightning-Caused Wildfires
As the graphic shows, people cause most wildfires. But lightning-ignited fires burn by far the most territory.
Warming Winters in the U.S.
A graphical look at the way winters have changed in the United States between 1895 and 2010.
Arctic Paradox: Warmer Arctic May Mean Cold Blasts for Some
Arctic warming and loss of sea ice may be helping to drive cold air southward, into the US and Europe, according to recent studies.
Arctic Sea Ice Thinning: Fall
Fall view: Arctic sea ice has been getting thinner – even faster than its area has been shrinking.
All the Ice on Greenland
Greenland holds enough ice to raise global sea level 23 feet – or to fill the Lower 48 states 2,940 feet high, like a bathtub.
Arctic Sea Ice Thinning: Winter
Winter view: Arctic sea ice has been getting thinner – even faster than its area has been shrinking.
