According to a new study, at least 50 percent of the world’s population lives in cities, and humans are building the equivalent of a city the size of Vancouver every week. This threatens to obliterate species and hasten the decline of natural resources.

Follow a group of scientists as they traverse the Namib Desert on foot to map a new 15-million-acre wildlife park in the heart of the African desert. Includes stunning photos and video.

Follow a month-long science expedition to discover new of fish species, more corals then anywhere else in the world, endangered turtles and other sea life new to science.

The red imported fire ant has spread across the southern United States since its introduction in the early 1900s to Alabama, wreaking billions of dollars in annual havoc on livelihoods, landscapes and native species.

Dell computers walks the walk with wind and methane power. Its commitment goes beyond headquarters.

At least two wildlife preserves will be forced to close down due to the new border fence between The U.S. and Mexico. The Department of Homeland Security is circumventing 30 environmental laws and regulations to build the fence.

Burmese Pythons are invading the Florida Everglades after being introduced more than 10 years ago. They’ve even swum more than six miles to the Florida Keys. This is a dangerous situation for people, animals, and habitat around Florida – even crocs!

People who are concerned about climate change struggle with carbon offsets. Do they make a difference? And if they do make a difference, how can you tell which programs have real quality? It all comes down to measurement, testing, and accountability.

A new study shows that biofuels are not a viable climate change solution. The study shows that converting natural land to farmland for biofuels is far worse for the environment than traditional fossil fuels. The study author calls for more benign renewabl

New bipartisan legislation helps forests by reducing fire risk and will restore jobs to rural areas hard-hit by the recession. The bill could also boost localized biofuel production. Sounds like just what the country needs.