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More than two thirds of San Diegans say a possible water shortage is a very serious issue, though only about one third say they've made a big effort to conserve water this summer. A poll out today als

Most people are familiar with the concept of a carbon footprint. But what about your "water footprint"? You might be surprised by the amount of water it takes to put that burger on your plate.

12 Additional Firefighting Helicopters Arriving Thursday

The U.S. wants to allow imports of fresh beef from Brazil, but the country has a history of foot-and-mouth disease. Imports could lower beef prices, but the deal has American ranchers worried.

Peaks around Glacier National Park store water that irrigates a large section of North America. But a warming climate is shrinking that snowpack, with ominous consequences for wildlife and people.

Over the last 20 years, the number of sheep in the U.S. has been cut in half. Today, the domestic sheep herd is one-tenth the size it was during World War II. Consumers are eating less lamb and wearing less wool these days. Those trends have left ranchers to wonder: When are we going to hit bottom?

Fires, snowstorms, tornadoes, drought, floods, oil spills — 2011 had them all, and that made it a very good year for disaster declarations. Even as they bear the scars of those events, many communities are already showing signs of resurgence.

If you turn on a faucet in the town of Magdalena in central New Mexico, nothing will come out.

San Diego's dry, hot and windy weather this past week made for ripe fire conditions, but among the half of a dozen brush fires that broke out none burned more than a few acres.

The heat-trapping gas hit a troublesome milestone last year in May when it reached levels of 400 parts per million of carbon dioxide. But this year, those levels are already being seen in March.