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Participants in the U.K. experimental study dramatically reduced their average alcohol intake for months after the initial dose. Ketamine has also been used to treat severe depression.

Congress has long struggled to pass new laws addressing climate change, even ones with bipartisan support. But the end-of-year spending package includes an energy bill with major climate measures.

Scott Detrow speaks with reporter Marina Bolotnikova about how climate change is forcing some species to become "invasive" simply to survive.

There's a little-known air pollution rule that more and more cities are using to keep their air quality within federal limits when wildfire smoke threatens to send them over pollution limits.

Global Witness, an international human rights group, says a record 227 grassroots environmental activists were killed in 2020. More than half were killed in Colombia, Mexico and the Philippines.

On Earth Day, Colorado climate activist Alan Bruce lit himself on fire outside the U.S. Supreme Court. He died of his injuries the next day. His friends and family say his intentions remain unclear.

The tree in Duesseldorf has gotten more than 5,000 letters and cards. People send it greetings, pour out their hearts, and ask for advice. The project encourages protection of old trees.

Leaders of the Export-Import Bank of the United States voted Thursday to help fund the expansion of an oil refinery in Indonesia.

Winter is underway, and through these dark, chilly days it's only natural to think longingly of summer. That's the season that's very much on the minds of…

Anyone who thought chaos might be magically shown the door on Jan. 1 was in for a rude awakening, as Mother Nature clearly had other plans.On this week's…