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.
2017 is on track to be the third hottest year on record for the U.S.
Shrinking Arctic sea ice is increasingly linked to extreme weather events around the world.