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Atlanta's mayor wants to convince businesses that the city is a regional leader on climate change initiatives. But, in a city whose efforts are contradicted by its state, how much can the mayor do?

Robin Webb is a state representative in Kentucky. Until she was 25, she worked as a coal miner. She describes why people do this kind of work and how they cope with ever present physical danger.

More than 300,000 passengers have ridden China's railway to Tibet since it opened to traffic two months ago. China sees it as a historic event, but the train's long-term effects on the remote Himalayan region remain to be seen.

Representatives from around the world have gathered to hammer out a strategy for reducing greenhouse gas emissions after the Kyoto treaty expires in 2012. One idea that seems to be gaining strength is a fund to help the poorest and most vulnerable countries adapt to a changing world. Negotiations in Kyoto started 10 years ago this week.

Satellite images show the amount of green vegetation on Earth increasing, despite deforestation. But some of the added greenery has a downside.

Audio recordings from Mars may not sound like much, but according to David Gruel and Roger Wiens at SuperCam, they could have a lot of scientific value.

Greenlanders are going to the polls Tuesday in a crucial election that could determine if the island taps its vast deposits of rare-earth minerals to fuel eventual independence from Denmark.

The animals are being launched into the cosmos as NASA researchers attempt to learn more about how the conditions of spaceflight can affect biological organisms and, by extension, future astronauts.

Two microphones aboard the Perseverance Rover make it possible to listen in on the Red Planet. They've captured nearly five hours of sounds, including the Martian wind.

Nfamara Badjie grew up framing rice in Gambia, now he's doing it in New York's Hudson Valley.