Tallying Biofuels' Real Environmental Cost

New studies show that biofuels are not carbon-neutral -- quite the opposite, in fact -- and that the world must account for their environmental impact in order to curb climate change

In Geneva, Designing a Global Climate-Alert System

Delegates from more than 150 nations gather this week at the World Climate Conference in Geneva to craft a better global alert system for climate change

Four Years Later, New Orleans' Green Makeover

After Hurricane Katrina flattened New Orleans on Aug. 29, 2005, the city emerged as an inadvertent symbol of global warming, the first American victim of climate change

The Four-Day Workweek Is Winning Fans

Shifting to a four-day workweek could save energy, cut traffic--and make you happier

Better Bulbs

High-tech lighting is getting more energy-efficient and more aesthetically pleasing too

Climate-Summit Agreement Still Far Off

With a new, more eco-friendly U.S. President, there were high hopes for Copenhagen. But little progress has been made toward a meaningful agreement

Laughing Gas: The Latest Threat to the Ozone Layer

Scientists are finding a new man-made threat to the ozone layer: nitrous oxide (N2O), otherwise known as laughing gas

New Clues in the Mass Death of Bees

Why do beehives suddenly collapse? The explanation may be a perfect storm of viruses

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Getting Real About the High Price of Cheap Food

He's raised on grass and hay and lives happily on a pasture by the ocean. His meat is free of antibiotics, but can we afford to eat it? We can't afford not to

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From Farm to Fork
Urban Farming

Can Geoengineering Help Slow Global Warming?

If we geoengineered the earth into a mess with our uncontrolled appetite for fossil fuels, maybe we have to geoengineer our way out of it

Extinction 'Gene': Some Species Are More at Risk

A new study finds that the risk for extinction isn't random — it tends to run in evolutionary families, wiping out groups of species at a time

Cash for Clunkers: How Big an Environmental Boost?

The government's cash-for-clunkers program is a big winner with American consumers and the auto industry, but how good is it for the environment?