Global warming crisis: One expert’s view

Global warming crisis: One expert's view
For an overview on warming, we interview the scientist who introduced the “hockey stick” graph showing rapid global warming. Is the stick still relevant? Dive into the science and politics of climate change: the ultimate environmental problem. More »

Arctic warming: Greenhouse gas nightmare?

Arctic warming: Greenhouse gas nightmare?
Large amounts of methane and carbon dioxide could be produced as warming changes Arctic lands and ocean. Could this start a frightening feedback, where warming makes more gas that makes more warming? More »

Love your arteries?

Love your arteries?

Think you can get away with an occasional high-fat junk food chow-down? A new study confirms that a single meal can harm your arteries. Eating the same number of calories in a Mediterranean-diet meal is benign or beneficial to the arteries. More »

Melting methane: New thermometer for ancient ocean?

Melting methane: New thermometer for ancient ocean?

Vast deposits of a strong greenhouse gas are frozen under the ocean. As the ocean warms, this methane is releasing. How much more methane is on the way, and how will it affect climate? More »

Fixing filthy beaches

Fixing filthy beaches

Most water pollution originates in polluted runoff. After a near-record number of beach closures, could green infrastructure convert stormwater from liability to asset? Rain gardens, rain barrels, infiltration ponds, green roofs, buffer strips all trap sediments and nutrients while reducing the load on sewer systems. Is green infrastructure oversold? More »

Soil: Key to solving the food crisis?

Soil: Key to solving the food crisis?

Could soil help? One-third of soils are degraded. In fighting desertification, erosion and nutrient loss, some soil-restoring techniques solve multiple problems. More »

Nuclear nightmare in Japan

Nuclear nightmare in Japan

With three nuclear reactors and three pools of spent fuel teetering on the edge of meltdown, Japanese technicians struggled to throttle the nuclear demons after the gigantic tsunami. Is Fukushima closer to Chernobyl or Three Mile Island? How will the disaster affect plans for a renaissance of nuclear power? More »

Gulf oil spill: It’s a gusher – one mile deep!

A large structure on water on fire, large black cloud, large surrounding ships spraying water

What kind of ecological damage can we expect from a sustained blowout in the Gulf of Mexico? What are the lessons of Exxon Valdez, and how well do they apply to the current outbreak of oil? Is prevention really the only strategy? More »

Communication: key to smart resource use

Communication: key to smart resource use
When everybody exploits a common resource without limit, we get the tragedy of the commons: Benefiting the individuals burns through the resource. A new economic strategy game, based on how animals and plants grow, suggests that communication helps players allocate the resource and still take home a bigger harvest. More »

Space Science: By Human or Robot?

Space shuttle Columbia has crashed, raising questions about research on the space shuttle and the International Space Station. Should we do space science by robots or manned vehicles? More »

Oil Spills Again

Oil Spills Again

What was the long-term impact of the Exxon Valdez spill in Alaska? Did the cleanup help, or make matters worse? Who are you going to believe in a case like this? More »

Biological Weapons

Biological weapons are microscopic killing machines containing viruses, fungi or bacteria — or the toxins made by these organisms. Read the history — and future — of living WMDs. More »