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Radioactive pollution Physical pollution that affects air, water and
soil. Caused by ionizing radiations of harmful nature emitted
from disintegrating atomic nuclei. The natural sources include cosmic rays that reaches the earth surface and radiations from radium 224, uranium 235 thorium 232 etc
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Man made sources Nuclear weapons Reactors and Nuclear fuel Waste waters
containing these wastes X-rays used in medical practices Ultra violet rays
present in solar radiations
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Effects Mutation Cancer Radioactive substances in food chain cause retarded growth
and bone cancer. Increases infant mortality rate
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Noise pollution Unwanted high pitch sound that pollutes the
environment. Maximum tolerable intensity of sound is 85 decibels The main
sources are automobiles, aero planes, loudspeakers, industries and other electro-mechanical devices.
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Effects of noise pollution Damage to ear drum and
impairment to hearing. Damages heart, liver and brain Emotional disturbances and
behavioral changes Leads to anxiety and stress
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Thermal Pollution The term thermal pollution has been used
to indicate the detrimental effects of heated effluents discharged
by various power plants.
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Causes of thermal pollution Nuclear power plants Coal fired power