The scientific name is the Holocene Age, but climatologists like to call our current climatic phase the Long Summer. The history of Earth's climate has rarely been smooth.

Runoff from agriculture is the biggest polluter of the country's river and stream water, according to the U.S.

Struggling through a third consecutive year of drought, California faces a bleak reality: Change the way we use our scarce water supply or face recurring cycles of economic and environmental emergencies. Given the urgency of the drought crisis, ...

Water is such a basic human need that it takes real ingenuity to find new ways to control, retrieve, and share this critical resource. We meet some of the wizards of water—the engineers who are helping communities handle acute water challenges and plan for the future.

Unchecked climate change could saddle taxpayers, businesses, and state and local governments across the country with hundreds of billions of dollars in damages, according to a new report released today by the Union of Concerned Scientists (UCS).

Contamination of China's fresh water resources from industrial pollution and inadequate sewage treatment is seen by Chinese residents as the nation's most critical environmental priority, according to a new public opinion survey.

The MDG Monitor shows how countries are progressing in their efforts to achieve the Millennium Development Goals (MDGs).

The year 2008 was the best yet for renewables. Even though the global economic downturn affected renewables in many ways starting in late 2008, the year was still one to remember.

Ever wonder how much space we would need to use to power the entire world with solar energy or offshore wind power? So did the good people at the Land Art Generator, who created two infographics that show the amount of surface area required to power our planet with renewable resources.

Scientists, led by Professor Martin Parry, the former co-chair of the Intergovernmental Panel on Climate Change, are set to warn that the UN negotiations aimed at combating climate change are based on unachievable low costs.