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Swimmers brave the waters in the shadow of a coal-fired power plant. Coal plants like this one emit CO2 into our atmosphere which is warming the planet and altering the chemistry of the ocean.
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Climate Change

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Great hammerhead in Bimini, Bahamas.
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Sharks

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Hurricane Katrina
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Hurricanes, Typhoons, and Cyclones

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
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Sea Level Rise

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Great White Sharks breach to hunt -- with split-second timing they grab their prey in one swift snatch. Follow the whole breaching action in this slideshow.
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Great White Shark

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A submersible explores the deep reefs off of Curacao in the Caribbean.
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DROP: The Deep Reef Observation Project

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A harp seal in icy water
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Seals, Sea Lions, and Walruses

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Two Adélie penguins on Paulet Island, Antarctica
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Penguins

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Waves breaking on the shore
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Currents, Waves, and Tides

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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
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Ocean Acidification

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two mangrove trees in the crashing waves
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Mangroves

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a frond of kelp underwater
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Kelp and Kelp Forests

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