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Thousands of leaders and activists from across the planet converged at the UN Climate Change Summit in December 2009.
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Climate Change Summit, Copenhagen

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A stormy sea lashes the village of Shismaref, Alaska, where the coastline has eroded 30–90 m (100–300 ft) in the past 30 years.
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Shismaref, Alaska

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Which country currently emits the most greenhouse gases? Test your knowledge here.
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Global Warming Quiz

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Intense volcanic CO2 vents in Ili Ili Bua Bua, Normanby Island, Papua New Guinea.
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Will Coral Reefs Survive Acidification?

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Two nurse sharks hover over a baited cage
Lesson Plan

Frozen Out

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Two nurse sharks hover over a baited cage
Lesson Plan

The Methane Circus

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Burning fossil fuels, such as coal, oil and natural gas, spews almost 7 billion metric tons of carbon dioxide annually.
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Smokestack from coal plant

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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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Coal plant

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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
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Shell Dissolves in Seawater

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Dr. Kathy Crane and colleagues stand on solid sea ice in the Canadian Arctic.
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Kathy Crane with colleagues on ice

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Globotruncana falsostuarti -- a foram that lived about 75 million years ago, during the Cretaceous Period.
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Globotruncana falsostuarti

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Compare the healthy coral on the left with the bleached coral on the right.
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Bleached Corals, Pacific Ocean

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