Noise pollution is loud an unpleasant sound in our environment. It can endanger people’s health. The worst source o noise pollution is transportation. Airplanes, trucks, cars, motorcycles, buses, and trains can all make excessive noise. Construction equipment is another very dangerous source of noise.
Sounds are measured in decibles. The softest sound that the human ear can hear is at 0 decible. A noise of 45 decibles will awaken the average person from a sound sleep. Normal conversation is measured at 50 at 60 decible. At a distance of 600 meters, the noise of jet plane taking off might reach 110 decibles, but a noise of only 85 decibles may demage hearing. Besides loss of hearing., excessive noise can cause other physical problems such as indigation, ulcers, and high blood pressure. It may even cause heart disease. In addition, stress from noise can cause severe tension in daily life and contribute to mental illness. Noise is now seen as a from of pollution that must be controlled. It is a dangerous to human life as the pollution of water and air.
Source : Practice Your Englsh (by Team of MGMP Bahasa Inggris)
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