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Gizmo Uses Lung Cells To Sniff Out Health Hazards In Urban Air

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Houston's Petrochemical Industry, Source Of Jobs And Smog

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The Houston Ship Channel is home to a wide range of heavy industry, including chemical processing plants and petrochemical refineries. Richard Harris/NPR hide caption

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Breathing Easier: How Houston Is Working To Clean Up Its Air

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Ira Leifer, next to an RV he has outfitted with methane sensors and other equipment to sniff the air. Richard Harris/NPR hide caption

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Not Your Grandpa's RV: This Roving Lab Tracks Air Pollution

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Crew members unload a catch of sockeye salmon at Craig, Alaska, in 2005. Researchers say fish are being found in new areas because of changing ocean temperatures. Melissa Farlow/National Geographic/Getty Images hide caption

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Go Fish (Somewhere Else): Warming Oceans Are Altering Catches

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Carbon dioxide readings at the Mauna Loa Observatory in Hawaii have reached what atmospheric scientist Ralph Keeling calls a "psychological threshold" of 400 parts per million. The amount of carbon dioxide in the atmosphere has been steadily increasing since near-constant measurements began at the observatory in 1958. Jonathan Kingston/National Geographic/Getty Images hide caption

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'Dangerous Territory': Carbon Dioxide Levels Reach Milestone

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Can Acid Neutralizers Help Coral Reefs Bounce Back?

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Increased Carbon Dioxide Levels Damage Coral Reefs

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Miguel Modestino, a Ph.D. student at the University of California, Berkeley, is part of the team working to create a solar fuels generator at the Joint Center for Artificial Photosynthesis. Roy Kaltschmidt/Lawrence Berkeley National Lab hide caption

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Could An 'Artificial Leaf' Fuel Your Car?

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Energy Secretary Nominee Dodges Question On Gas Exports

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Ken Caldeira of the Carnegie Institution for Science takes a water sample during his experiment 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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This Scientist Aims High To Save The World's Coral Reefs

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EPA Proposes New Rule To Clean Up Gasoline And Reduce Smog

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The city of Gladstone near the Great Barrier Reef is the world's fourth largest coal-export hub. Dredges, like one seen here, have turned the harbor brown as they work to expand the coal port. Richard Harris/NPR 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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On Australia's Heron Island, buff-banded rails like this one have become the avian equivalent of a weed. Richard Harris/NPR hide caption

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The Call Of The Shearwater

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