Brazilians head to the polls Sunday to vote in a presidential election that is testing the world's fourth-largest democracy and could have a critical impact on the fight against climate change.
The saltwater is threatening drinking water supplies in the New Orleans metro area. The U.S. Army Corps of Engineers built an underwater levee to stop the intrusion.
The world is set to start crucial climate change negotiations soon. To avoid extreme warming, nations have to make deep cuts in heat-trapping emissions, fast.
A new report from Greenpeace found that people may be putting plastic into recycling bins — but almost none of it is actually being recycled. Meanwhile, plastic production is ramping up.
Runoff from a growing number of giant solar farms polluting rivers and streams in rural South Georgia is becoming a major concern, an official with the state Environmental Protection Division said Monday.
While the U.S. considers finally banning the carcinogen, a group of men has come forward, saying they were exposed repeatedly while working at a chemical plant in New York.
Scientists are finding that Western wildfires can have far-reaching impacts. If they're burning while Central U.S. thunderstorms are forming, the rain and hail can be dramatically more destructive.
Climate change-fueled hurricanes and sea-level rise get a lot of attention, but Mississippi River Basin communities also are experiencing the effects of global warming.
The park began allowing regular visitor traffic along the Northeast Entrance Road on Saturday for the first time since it closed the entrance in response to severe weather.
A new report from the World Wildlife Fund and the Zoological Society of London analyzed years of data on wildlife populations across the world and found a downward trend in the Earth's biodiversity.
A recent stranding on remote New Zealand islands left nearly 500 pilot whales dead. Scientists still don't know for sure why the events, also known as beachings, occur, but they have some ideas.
San Diego has an ambitious plan to store renewable energy, using extra solar power to pump water up a mountain. This old-style "water battery" technology could be set for a revival.