Though noise pollution is not often trumpeted as a major environmental concern, it still poses serious health problems. Studies show that sleep disorders, hearing loss, high blood pressure and anxiety can be caused by noise pollution. Sounds that have become part of everyday life, from the urban to rural areas, have a cumulative affect on the environment and our well-being. Among the most frequent sources of noise pollution are motor vehicles, trains, and airplanes. Construction or factory equipment are often sources of excess noise, as are outdoor equipment such as lawn mowers and leaf blowers.