A ski resort's plan to use sewage for snow production prompts gagging and protests.
Chlorine has a dark side, but giving it up is proving difficult.
Researchers are building vegetable gardens that could one day be used to support colonies on the moon.
Can the the United States' Clean Water Act be used to combat carbon dioxide emissions?
Plants and animals from polar bears to marine iguanas are turning into runts.
A new expedition into Antarctica will investigate how much methane is bubbling from the ocean floor, and whether it will have a significant impact on global climate.
Grasses are taking advantage of the warming Antarctic climate. Are weeds next?
Researchers defend their finding that microbes integrated arsenic into their cells.
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