... strange to people They lived healthily, drank pure water, and breathed fresh air Nowedays, the situation is quite different People on over the word are worried about things that are happening to ... 1960s That it, it started in the A 19th century B 20th century C 18th century D 21th century 10 Mary said to me, “Can you speak English ?” She asked me A If I can speak English ... two hundred years ago _ A The environment was polluted as much as it is today B People knew nothing about environmental poluution C Air was polluted badly D People were faced with pollution...