Define pollution. what arr the types of pollution. write its causes effects and prevention measures.

Definition: the presence in or introduction into the environment of a substance which has harmful or poisonous effects.

“Pollution is the introduction of substances (or energy) that cause adverse changes in the environment and living entities .” Pollution need not always be caused by chemical substances such as particulates (like smoke and dust). Forms of energy such as sound, heat or light can also cause pollution.

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