Keep America Beautiful is probably the best-known litter awareness group in the United States, yet they have flatly refused to touch the issue of cigarette litter, the most prolific form of litter in the world. KAB has a joint program in cooperation with Philip Morris that blames the cigarette litter problem on a lack of ashtrays -- a way of spinning the issue that Philip Morris favors. Some Philip Morris employees have even boasted that more public ashtrays serve as a subtle advertisement for the popularity of their product.