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Pollution means contamination of environment. Our environment is polluted in two ways –air pollution and water pollution. Air is polluted in many ways. Smoke pollutes air; man makes fire to cook his food, to make brick, melts pitch for road construction and burns wood. All these things produce heavy smoke and this smoke pollutes air. Railway engines, mills and factories and power houses use coal and oil. Buses, trucks and cars use petrol and diesel. Again all use chemical fertilizers and insecticide in tier lands to grow more food. the rain and fluids wash factories pollute water by throwing the waste materials and unsold products into the rivers and canals , steamers , launches and even sail boats pollute water by throwing oil, food waste and human waste into the big canals and rivers. Unsanitary latrines in the countryside standing on the banks of the rivers and canals also pollute water. Thus air and water are polluted and as a result our environment gets polluted.

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