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The author holds optimistically that with the aid of our knowledge and technology, we will eventually be able to find ways to prevent sudden changes in climates and avoid natural disasters.

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NG

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Scientists from many countries agree that the recent warming is caused in part by such human activities as man’s ever-increasing consumption of gas or oil.

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To a large extent, our ancestors’ total ignorance of sudden changes in weather led to the destruction of some ancient civilizations.