More CO2 means larger poison ivy plants and more toxic oil per plant.
In a more acidic ocean, shellfish, plankton and corals struggle to adapt.
CO2 mixes with seawater to form carbonic acid, making the oceans more acidic.
As the climate warms, rising sea levels will mean more damage from hurricane storm surge.
The city recorded more than 7 inches of rain in 24 hours, the third-highest single day rainfall total for any day since record-keeping began in 1891.
What scientists know well, and what's left to learn, about extreme weather and climate change.
Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
Every state in the U.S. has warmed since the first Earth Day, although the rate of warming varies. Check out how much it’s warmed in your state.