短文改错。
Throughout history man has changed their physical environment in order to improve his way of life. With
the tools of technology that he has changed many physical features of the earth. Thus, man's changes to the
physical environment has not always had beneficial results. Today, pollution of the air and water is a increasing
danger to the health of the planet. Like we know, massive destruction of environment has brought in negative
effects and even formed a great threat to man's existence. Therefore, effective measures should be taken and
laws pass to conserve environment. Otherwise, man is certain to suffer the serious consequences causing by
this lack of care for his living surroundings.
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