http://www.youtube.com/watch?v=pooZM_hBRJ4&feature=related

America generally has done a very good job in reducing water and air pollution. If you have been in Beijing or Manila where the air is so polluted that most people wear air-filter masks in public, then you can appreciate the only slightly dirty air of New York City or other urban areas.  There is one form of pollution, though, that we haven’t fully tackled yet: noise pollution. In residential areas the decibel levels can climb in the summer months as souped-up motorcycles are brought out of storage and people roll down the car windows and crank up the tunes. A little history from Wikipedia: