Just like our bodies, the climate system can become unbalanced if it gets too much of a good thing.
Transportation accounts for 28 percent of Americans’ overall greenhouse gas emissions. Here's a look at how various modes stack up.
As the U.S. and globe have warmed, lake-effect snowfall amounts have been on the rise.
A look at how El Niño influences global weather patterns.
A graphical look at the top indicators of a warming world.
Better grab your calamine lotion. More CO2 means bigger poison ivy plants.
Climate change has increased pollen counts and the length of the pollen season, trends that are expected to continue through mid-century.
If global warming continues unabated, only 6 of the 19 previous host cities could host the Winter Games again by the 2080s.