Celebrities, stores take a shine to green cleaning products

What do Wal-Mart, Target, Ed Begley Jr. and Don Imus' wife have in common? They're all on the green-cleaning bandwagon. The growing popularity of cleaning products that are -- or claim to be -- Earth-friendly is part of a larger trend, a wave of environmentalism that's been sweeping the country since Al Gore's 2006 documentary, "An Inconvenient Truth," focused popular attention on the threat of global climate change.

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