Polluters are man-made effects on the environment like boats, cars, and helicopters. They release exhaust fumes which pollute cities. A good example of a city that has a high level of pollution is Beijing China. Their problems were brought to the world's attentions during the Olympics is 2008. Beijing is so heavily polluted that many people where surgical masks. Breathing the air in Beijing is the rough equivalent of smoking two packs of cigarettes a day.