单选题 Regarding the dangers of pollution, the writer believes that A there is a need for rational discussion. B indoor pollution is a recent phenomenon. C people should worry most about their work environment. D industrial pollution causes specific diseases.

【正确答案】 A

【答案解析】Last para: ... it makes sense to consider the small-scale pollution at home and welcome international debate about this. Scientists investigating indoor pollution will gather next month in Edinburgh at the Indoor Air conference ...