http://consumerist.com/2008/06/25/home-depot-has-started-a/

Home Depot has started a nationwide compact flourescent light bulb recycling program. “At each The Home Depot store, customers can simply bring in any expired, unbroken CFL bulbs, and give them to the store associate behind the returns desk.” CFL bulbs contain mercury and can be damaging to the environment if thrown into regular landfills. [New York Times]