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Canada's potentially lucrative oil sands business faces serious economic challenges. It has some concerned about its future as environmental critics look for ways to keep the oil in the ground.

In recent years, Maine’s water resources have come under heightened scrutiny amid climate change, the megadrought threatening the Colorado River, smaller seasonal droughts that have challenged Maine food growers and dried up some wells, and growing awareness of contamination from PFAS and other chemicals.

Clean energy is crucial to meet rising U.S. electricity demand, according to industry analysts and executives. But the Trump administration's actions could slow development.

President Trump and others are spreading false narratives about water and the LA wildfires. These include the notion that the city didn't have enough water to fight the fires.

Two years ago Colombia pledged to stop exploring for new oil, gas and coal. On the world stage, this was a big deal. Here's what's happened since.

Despite the coronavirus pandemic that closed schools nationwide, students from 46 states and the District of Columbia submitted entries. We've narrowed those down to 25 finalists.

World leaders are congratulating President-Elect Joe Biden on his victory and they include some who have been close allies of President Trump.

Scientists say accelerating deforestation and development may increase the risk of pandemic diseases. The current economic crisis may also make that trend worse if more people cut down trees for fuel.

The Exxon Mobil CEO had, at times, a shaky hearing before the Senate Foreign Relations Committee on Wednesday. He's still expected to win confirmation, but perhaps narrowly.

Public health agencies are set up to regulate air pollution from cars, trucks and factories. Wildfire smoke presents a different set of threats, prompting some of those agencies to rethink priorities.