According to the passage, human-generated air pollution in localized

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.

A. can be dwarfed by nature’s output of pollutants

B. can overwhelm the natural system that removes pollutants 

C. will damage areas outside of the localized regions 

D. will react harmfully with natural pollutants

* Đáp án

B

* Hướng dẫn giải

Chọn B.

Đáp án là B.

Giải thích: 

Đoạn 3: However, human production usually occurs in a LOCALIZED area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles.

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