African elephants are listed as “vulnerable” because they are losing habitat and remain a target for ivory poachers. But these intelligent, iconic animals are getting some help, as the world recognizes they shouldn’t be killed for their tusks.

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Solar-and-battery powered tracking collars have given British researchers new insight into the hunting habits of the cheetah, one of the world’s swiftest predators.

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Robert Redford, leading man, acclaimed director and ardent conservationist, has become an American father figure, and this week as we approach Father’s Day, he’s speaking dad-to-dad to President Obama.

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Some East Texas residents living near the Keystone XL pipeline say they’re uneasy about the project’s potential to leak, having seen that crews have returned to make several repairs on the just-laid pipe. Video by Texas Public Citizen.

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This beautifully shot video of a poor neighborhood in Houston, gives a glimpse of how difficult life can be near the biggest oil hub in the U.S..

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Two years of sport hunting have taken a toll on the gray wolves in the U.S. Northern Rocky Mountains. Their population is down by 34 percent after what one biologist satirically calls a “robust” hunting season.

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Carbon dioxide in the atmosphere is hovering at a landmark 400 parts per million, a level never before experienced by human beings. Scientists say we’re playing with fire, risking the planet’s future if we don’t start to lower the greenhouse gas levels forcing climate change. How should we react to this news? First, we need to envision climate change more accurately, as a deadly threat.

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Air pollution continues to plague many large U.S. cities, where coal plants and tailpipe emissions poison the air with asthma-aggravating, cancer causing ozone and particle emissions. But the picture, and the air, is much clearer in Peoria, Springfield and a few dozen other mid-sized meccas, according to the American Lung Association’s annual report. See what the air rates where you live.

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Wildlife poaching is soaring, and if bans and legal trading efforts do not stop it, the final hope for animals threatened with extinction may lie with consumers.

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Climate change will continue to worsen wildfires in the U.S., with the area burned each year expected to double by 2050, according to a report released this week by the USDA’s Forestry Service. But that’s not all. Profound changes are ahead for forests in the Midwest, Southeast and Northeast, as climate change rearranges natural habitats.

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Several homeowners in a Little Rock suburb were evacuated from their Mayflower neighborhood after a pipeline spilled an estimate 2,000 barrels of tar sands crude.

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Amid record-breaking levels of air pollution, a Beijing-based British artist has gone to extraordinary lengths to protect himself against the city’s foul air while making a political point at the same time.

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