With pollution becoming an international problem, environment protection has been h

Some people have become concerned _____ another kind of pollution.A、aboutB、withC、forD、by

It is an advantage of using the solar energy that it won’t create any pollution.（英译中)

Air pollution People and air pollution are often in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different thi

根据下面材料，回答题。 Lead Pollution （铅污染)Lead deposits, which accumulated in soil an

Pollution occurs whenever unnatural substances are introduced into an environment. Most

Such problems______air pollution and traffic jams are becoming more and more serious in so