Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
Every state in the U.S. has warmed since the first Earth Day, although the rate of warming varies. Check out how much it’s warmed in your state.
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.
Spring is arriving earlier across the U.S. by an average of three days.
Just like our bodies, the climate system can become unbalanced if it gets too much of a good thing.
Atmospheric carbon dioxide levels continue to climb, averaging 400 parts per million for the month of February — the earliest in the year Earth has hit this global warming milestone on record.
This is the first time in at least 800,000 years, and possibly as long as 2 million, that atmospheric carbon dioxide levels have been this high.