This document discusses noise pollution. It defines noise pollution as the disturbance of the environment with loud, uncoordinated sounds that are irritating. The document then discusses the causes of noise pollution, including vehicles, industrial machinery, construction sites, loud speakers, and large events. It also covers the effects of noise pollution on human health, such as hypertension, stress, and hearing loss. Finally, it provides some techniques for controlling noise pollution, such as sound insulation, absorption, and damping, as well as reducing noise at the source during urban planning.