In a program started in May in Canada and now running from the United States to Spain, TerraCycle collects cigarette butts from volunteers and turns them into plastic, which can be used for anything, even ashtrays themselves. The discarded cigarettes, which litter countries around the world, are first broken up, with the paper and remaining tobacco composted. The filter, made of a plastic called cellulose acetate, is melted down and turned into an ingredient for making a wide range of industrial plastic products, such as pallets -- the trays used to ship heavy goods. It seems that for once smoking benefits everyone. The tobacco industry, happy to get some decent publicity, pays TerraCycle. Volunteer collectors win points per butt, which can then be redeemed as contributions to charities. Sidewalks start looking cleaner. And TerraCycle, which sells recycled products to retailers like Walmart and Whole Foods, gets more business.