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Residents in the City of San Diego will only be allowed to water their lawns three days a week. We speak to representatives from the San Diego Water Department and the County Water Authority about the reasons behind the new restrictions. We also speak to a local garden journalist about how people can make their landscaping more water-efficient.

A water dispute is causing tension between the Southwestern towns of Beaver Dam, Ariz., and Mesquite, Nev. Residents in Beaver Dam are upset over a plan to export the town's remaining water supply across state lines to fuel a development boom in Mesquite.

How is the field of biomimicry best illustrated in design and inventions around the world? We'll learn about the San Diego Zoo's biomimicry program which explores animal behavior and draws upon the natural world for fun and profit.

Scientists say the world's future is bleak if nothing is done to control global warming. Emissions of greenhouse gases get the blame for rising air and ocean temperatures.

While lawmakers continue to grapple with the state budget, Governor Arnold Schwarzenegger is pushing his plan for more water storage. From Sacramento, Jenny O'Mara reports.

When we think of the Imperial Valley we think dry, hot, desert conditions but the valley is home to an enormous agricultural industry. Farmers in Imperial Valley have a long history, we'll hear what's happening now to jeopardize the future of the industry.

The San Diego County Water Authority asks residents to cut their water usage by 20 gallons per day. How can you do that? We speak to the County Water Authority about the "20-Gallon Challenge", a hor

Two top intelligence officials have testified in Congress about the implications of climate change for U.S. national security. They discussed an assessment that identifies parts of the world where climate change could produce political instability.

In Florida, Lake Okeechobee's water level dropped enough that dry grasses on the lake floor caught fire. But the weather isn't the only reason for the state's water woes, the author of a new book says.

What's in bloom at the Anza-Borrego Desert? A park ranger joins the show to talk about the flora and fauna of the region.