As the level of carbon dioxide in the air rises because of human activity, scientists are trying to pin down how plants are affected. There's evidence that it's changing many important plants we eat.
The EPA intends to block rules to prevent and respond to leaks, explosions and other disasters at chemical facilities and refineries around the U.S. That scares many people who live and work nearby.
After decades of modern fire prevention some forests are much thicker than they've been historically. New research offers a guide to thinning that could keep wildfires smaller and shorter.
In southwestern Colorado, residents of more than 2,000 homes have been ordered to evacuate, and the San Juan National Forest is closed to visitors due to extreme risks.
A new survey of baobab trees in Africa finds that many of the oldest have died or significantly deteriorated in the last decade. Scientists say climate change and human intervention could be culprits.
Climate change is increasing the frequency of rainstorms in many parts of the U.S., and those storms bring more rain. Many communities don't have the drainage systems needed to handle all the water.
Hurricanes are moving more slowly than they used to. That means storms are dumping more rain and doing more damage when they make landfall, as Hurricane Harvey did when it lingered over Houston.
The aide said EPA Administrator Scott Pruitt asked for help procuring a mattress while he was apartment hunting. Federal ethics rules prohibit staff from doing private work for their superiors.
After Hurricane Maria, Christine Nieves started the Proyecto de Apoyo Mutuo Mariana to feed a community that was devastated by the storm. They still offer one meal a day.
To answer the question of whether Puerto Rico is prepared for this year's hurricane season, you have to understand how far the island has come since Hurricane Maria.
