Here's how the decline in coal use is linked to climate-friendly cars.
Since the first Earth Day in 1970, the average annual temperature in every state has climbed.
As the climate changes, see the trend in warmer-than-normal spring days in these cities.
As the climate warms, maples are being tapped earlier in the year to get the sap that produces syrup.
Warmer winters have consequences, including for our winter fun.
Globally, 2016 was the hottest year on record. That makes three years in a row of record setting heat.
See the trend in winter high temperatures across the U.S.
An examination of how high temperatures throughout the year are projected to rise by the end of the century under two different emissions scenarios.