Greenhouse gases come from several sources in the U.S., not just your furnace and you car exhaust.
Greenhouse gases held steady for hundreds of years, but have jumped up since the start of the industrial era.
Trees have widespread climate benefits, from lowering cooling costs to reducing our carbon footprint.
See how trees in these cities are improving air quality, reducing flood risks, and offsetting carbon emissions.
Global average temperature has already warmed 1°C beyond pre-industrial levels, on its way to 1.5°C without deep emissions cuts.
Dramatic cuts in CO2 are needed to keep Earth from warming more than 2.7°F (1.5°C) above pre-industrial levels.
May the Force be with you! The arid world of Tatooine and the icy world of Hoth from the Star Wars universe show the importance of atmospheres in a planet’s climate.
Globally, 2017 is trending as the second hottest year on record, only behind 2016.