Warming waters are decreasing oxygen in the oceans, creating dead zones for marine plants and animals.
As the climate warms, maples are being tapped earlier in the year to get the sap that produces syrup.
Warming winters may sound great at first, but they bring new problems.
Later frosts mean longer growing seasons for the U.S.
Climate change is altering important elements affecting fall foliage.
The average number of large wildfires burning across the Western U.S. each year has tripled from the 1970s to the 2010s.
Higher levels of carbon dioxide in the atmosphere lead to a more acidic ocean.
Each of the National Parks faces unique challenges from climate change, including increased heat.