Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
If CO2 emissions continue at the current pace, pollen counts are projected to nearly double by 2060.
This year's sad California snowpack "obliterates" the previous record low.
2015's annual maximum of winter Arctic sea ice is the lowest in the satellite record.
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.