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A new robot is designed to sink sargassum before the stinky seaweed comes ashore. Sargassum can wreck local economies, ecosystems — and even threaten human health, some research suggests.

Hurricane Ida rapidly gained strength right before it hit Louisiana on Sunday. Abnormally hot water in the Gulf of Mexico acted as fuel for the storm.

The head of the Environmental Protection Agency says he does not agree that carbon dioxide is the main driver of climate change.

During the campaign, the president-elect said climate change is not real, and he rejected last year's international agreement to cut greenhouse gases.

Since his reelection, President Obama has talked a lot about the importance of addressing climate change and promised action. Environmentalists have criticized him for not doing more to confront the issue. In the coming weeks he'll announce a new agenda promoting energy efficiency and reducing greenhouse gas emissions.

The Kyoto Protocol of 1997 didn't slow down the gradual warming of the planet. Now governments meeting for a two-week summit are trying an a la carte approach.

The U.S. has long enjoyed a solid reputation as a trustworthy place to do business. But President-elect Trump's potential conflicts of interest around the globe could challenge that reputation.

Scientists from the Woods Hole Research Center and IPAM-Amazonia say the amount of carbon dioxide released into the atmosphere by fires burning in the…

Six advocates were first elected in 2022. This year, all who ran were endorsed by the group No Coal, No Gas, which advocates for transitioning the region’s grid off of fossil fuels.

Liberal activist Tom Steyer pledged to spend $100 million in the 2014 election cycle to promote his favored cause of fighting climate change. David Greene talks to Steyer about his political plans.