Warming waters are decreasing oxygen in the oceans, creating dead zones for marine plants and animals.
Excessive carbon emissions are worsening the ocean's health.
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.