Police were checking cars throughout Paris on Monday, including near the Arc de Triomphe, as the city tried to cut air pollution by instituting odd-even driving restrictions. Philippe Wojazer /Reuters /Landov hide caption

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A tasseled wobbegong shark (top) lies on the seafloor with the head of a brown-banded bamboo shark in its mouth on the fringing reef of Great Keppel Island on Australia's Great Barrier Reef in August 2011. Reuters/Landov hide caption

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An animal's ranking on the food chain depends on where its meals place on the ladder. That puts plants on the bottom (they make all their food), polar bears on top and people somewhere between pigs and anchovies. Lisa Brown for NPR hide caption

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Saltwater wetlands that include marshes and shoals on Virginia's Atlantic coast. U.S. coastal wetlands losses were 25 percent greater from 2004-2009, according to a recent federal study. U.S. Fish and Wildlife Service hide caption

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The Chinese border town of Suifenhe is a port of entry for almost all of the hardwood coming from the Russian Far East. Russia is the world's largest exporter of timber, but illegal logging is a growing problem. Courtesty of EIA hide caption

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Former President Bill Clinton hugs House Minority Leader Nancy Pelosi of California as another Democrat, Sen. Barbara Boxer of California, looks on at Wednesday's ceremony naming the Environmental Protection Agency headquarters for him. Pablo Martinez Monsivais/AP hide caption

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Homeowners can receive up to $4,000 for replacing their lawns with less thirsty plantings, in a rebate program run by the Los Angeles Department of Water and Power. iStock hide caption

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Flames from the Doce Fire rise above a hillside in Arizona's Prescott National Forest at dusk on June 18. Todd Tamcsin/American Red Cross via AP hide caption

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Apple Blossoms Amy Irish-Brown hide caption

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The new rules' would reduce harmful emissions, the EPA says. David Paul Morris/Getty Images hide caption

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Heron Island is located on the southern end of the Great Barrier Reef, about 25 miles off the northeast coast of Australia. Ted Mead/Getty Images hide caption

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A Ford Focus electric concept car with a home charging unit on display at the 2013 North American International Auto Show in Detroit, Mich., in January. Stan Honda/AFP/Getty Images hide caption

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The Two-Way

Flipping The Switch: What It Takes To Prioritize Electric Cars

Estonia now has the world's first nationwide electric car charger network. What would the U.S. have to do to make a similar leap?

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A truck carrying hardwood timber drives along a rural road leading to Paragominas, Brazil, on Sept. 23, 2011. The city has become a pioneering "Green City," a model of sustainability with a new economic approach that has seen illegal deforestation virtually halted. Andre Penner/AP hide caption

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