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New effort to dismantle aging U.S. dams aims to improve wildlife habitats

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Some 1,000 U.S. dams have been dismantled in the past 100 years — but the pace has definitely been accelerating in recent years. Now, there's a major initiative underway to take apart old dams that serve little purpose as a way of restoring fish habitat and rebuilding aquatic ecosystems.
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As ocean gets more acidic, situation is exacerbated in Puget Sound

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The carbon dioxide we release is absorbed by the Earth's oceans. But it doesn't just benignly vanish. It's eventually released into the water, making the water more acidic. That's feeding algae blooms and killing some animals. In the Puget Sound, the situation is even worse.
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Lawsuit over BP oil spill threatens academic freedom, critics say

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The multinational oil company BP recently was allowed to move ahead with a subpoena to gain access to 3,000 emails among the first scientists who showed up to measure the oil spilling from the Deep Water Horizon and contain the damage. Critics say BP's subpoena will have a harmful effect on academic freedom.
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Declining moose population in upper Midwest may be due to climate change

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In the last 20 years, the moose population in the northern Midwest has declined. Researchers believe this may be due to climate change and warmer temperatures as well as an increase in the number of predators to moose.
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On eve of Rio environmental conference, Brazil pushes back forestry changes

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Brazil's environmentalists have been pushing the nation's president to roll back the sweeping environmental changed the country's Congress passed. They got some of what they want, but another environmentalists is pushing for a radical change in how we think about climate change treaties.
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New research says commonly used chemicals are partly to blame for obesity

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Some researchers, including Bruce Blumberg from the University of California, Irvine, believe chemicals we’re unwittingly exposed to could be making us fat. Blumberg said if the timing is right, exposure to these chemicals may be instructing stem cells to become fat cells.
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Tobacco industry linked to proliferation of flame retardants in American homes

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The debate over fire retardant chemicals has flared up again, prompted by a new investigative series in the Chicago Tribune. Reporters traced a decades-long campaign created by tobacco lobbyists to distract attention from the fire hazard caused by smoking.
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Bike ridership low due to promotion of helmets, urban motility expert says

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Evidence clearly shows the benefits of wearing a helmet in a bike crash. But some critics are now arguing that there are unintended consequences to helmet-wearing, like a decrease in bike ridership.
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Resturant chain Chipotle backs FDA guidelines on animal antibiotic use

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The U.S. Food and Drug Administration recently introduced a voluntary plan to limit the use of antibiotics on farm animals, a move that restaurant chain Chipotle says is long overdue.
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10 newly discovered species you have to see to believe

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Some 18,000 new species are discovered every year, some still alive and even a few that have since gone extinct. These new species, though, aren't your typical old monkeys and flowers. Almost all of them have distinct looks them make them truly a shock to see.
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