A power-generating windmill turbine is seen in front of the Arc de Triomphe on the Champs Elysees avenue in Paris ahead of the COP21 World Climate Summit, which begins Monday. Christian Hartmann/Reuters /Landov hide caption

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Floodwaters from rising sea levels have submerged and killed trees in Bedono village in Demak, Central Java, Indonesia. As oceans warm, they expand and erode the shore. Residents of Java's coastal villages have been hit hard by rising sea levels in recent years. Ulet Ifansasti/Getty Images hide caption

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Science Confirms 2014 Was Hottest Yet Recorded, On Land And Sea

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President Obama, seen here inspecting solar panels on the roof of the Department of Energy, has submitted a U.S. pledge to reduce greenhouse gases. Kevin Lamarque/Reuters/Landov hide caption

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Scientists Track Down Serious Methane Leaks In Natural Gas Wells

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Country representatives listen to opening remarks at the start of the United Nations' Conference of the Parties on Climate Change in Lima, Peru. Cris Bouroncle/AFP/Getty Images hide caption

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World Climate Talks In Lima Aim To Move Beyond Kyoto Treaty

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U.S. President Barack Obama, right, smiles after a group of children waved flags and flowers to cheer him during a welcome ceremony Wednesday with Chinese President Xi Jinping at the Great Hall of the People in Beijing. In a surprise agreement late Tuesday, China agreed to a first-ever target for capping its carbon emissions, while the United States pledge to cut faster than previously planned. Andy Wong/AP hide caption

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An oil refinery is pictured in the southern Sydney suburb of Kurnell earlier this week. Australia's Senate voted on Thursday to scrap the country's carbon tax and plans for emissions trading — a major victory for conservative Prime Minister Tony Abbott. Jason Reed/Reuters/Landov hide caption

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The EPA is proposing rules that would govern carbon dioxide gas emissions by U.S. power plants. Here, coal is transported via conveyor belt to the coal-fired Jim Bridger Power Plant outside Point of the Rocks, Wyo., in March. Jim Urquhart/Reuters /Landov hide caption

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EPA Unveils New Proposal Targeting Greenhouse Gases

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The Capitol dome is seen behind the Capitol Power Plant, which provides power to buildings in the Capitol complex in Washington, D.C. Carolyn Kaster/AP hide caption

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Ken Caldeira of the Carnegie Institution for Science takes a water sample during his experiment out on part of the Great Barrier Reef. The water is slightly pink because his team is using a dye to trace an acid-neutralizing chemical as it flows across the reef. Richard Harris/NPR hide caption

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Climate activists at a rally in Doha on December 1, 2012. Karim Jaafar/AFP/Getty Images hide caption

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Prepare to see this more often, even in usually cooler climes, the experts say. Elaine Thompson/AP hide caption

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Richard Harris

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