There is a different between natural catastrophes-those extreme events in nature,such as earthquakes,that cause widespread damage and man-made environmental catastrophes,for which we,human beings,are responsible.Man-made disasters pollute huge areas and cause extensive damage to animals,plants,and even to human beings.Examples include oil and chemicals spills,accidents in nuclear power plants,overfishing in seas,and large scale destruction of forests.The increased green house effect also belongs to the category of man-made environmental catastrophes.
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