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.
See how many days this winter were warmer or colder than average in your city.
As the climate warms, maples are being tapped earlier in the year to get the sap that produces syrup.
The 10 hottest years ever recorded have all occurred since 1998.
Warmer winters have consequences, including for our winter fun.
Warming winters may sound great at first, but they bring new problems.
Extreme cold is decreasing, as the lowest temperature observed each year is trending upward.