Whole Foods, others to stop using plastic bags

Disposable plastic bags, which are made of petroleum, are under siege these days. Americans use 100 billion plastic bags a year and only about 1 percent are recycled, according to the Worldwatch Institute, an independent research organization that focuses on environmental issues.

And that, as Earth Day is celebrated Tuesday, is cause for concern.

Some states and cities have considered banning or taxing disposable plastic bags. Several grocery store chains have cut their use.

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