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Earth Day is Saturday. But Marines and Sailors at Camp Pendleton got a head start on the celebration today.

Dujiangyan is famous for its ancient irrigation system — which was built about 2,300 years ago. But the massive earthquake that devastated this Chinese city also damaged a huge hydropower dam upstream. There are fears that if the dam fails, a bigger disaster would follow.

San Diego editors review the top stories that impacted the region in 2009 and how they may play out in 2010.

Southern Nevada "water czar" Patricia Mulroy has used finely tuned negotiation skills, political savvy and her own special brand of municipal tough love to keep Las Vegas from running out of water.

After winning a major battle against a resurgent Taliban in southern Afghanistan, NATO forces are working to keep their gains from slipping away. Building a road to link remote villages is one way they hope to keep locals from siding with the enemy.

Where is climate change currently happening on Earth, and what's causing those changes to occur? We speak to a physicist from the Jet Propulsion Laboratory about where major climate changes are taking place, and how climate modeling helps to predict future changes in our atmosphere.

What's the summer gardener to do now that July has arrived? We'll talk with garden expert Nan Sterman about getting the most out of your summer garden.

Russians like to joke that they might be the only people to benefit from global warming. At least, they say, it might temper Russia's notoriously cold winters. But scientists in Moscow are concerned that increasing temperatures will help spread malaria and other diseases to new areas.

They know what the winds can do. They forecast them. Fight the fires the winds fan. Prepare for evacuations that, in years past, never came. They thought they knew, until seven days of fury began a week ago. "

Some of the most advanced climate models show global warming hurting agricultural production in the world's poorest regions. But Cynthia Rosenzweig, a NASA scientist who's studied this question for 20 years, has faith that solutions are within reach.