Plastic bags are killing us

On a foggy Tuesday morning, kids out of school for summer break are learning to sail on the waters of Lake Merritt. A great egret hunts for fish, while dozens of cormorants perch, drying their wings. But we're not here to bird-watch or go boating. Twice a week volunteers with the Lake Merritt Institute gather on these shores of the nation's oldest national wildlife refuge to fish trash out of the water, and one of their prime targets is plastic bags. Armed with gloves and nets with long handles, like the kind you'd use to fish leaves out of a backyard swimming pool, we take to the shores to seek our watery prey.

Dr. Richard Bailey, executive director of the institute, is most concerned about the bags that get waterlogged and sink to the bottom. "We have a lot of animals that live on the bottom: shrimp, shellfish, sponges," he says. "It's like you're eating at your dinner table and somebody comes along and throws a plastic tarp over your dinner table and you."

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