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t be so worried about the environment of the earth C. there are problems facing the earth , but not serious enough D. we will change our way of life sooner or later 6. The key to solving the major problems facing the earth is _______. A. to educate the people of the world B. to improve the living conditions of the people C. to treat people equally and fairly D. to hold conferences like the Earth Summit frequently Read the text and find out which paragraph the main idea below belongs to. a. the big three and the results caused by them b. it is a place to find solutions for the future c. a brief introduction to the Earth Summit. e. Words by a visitor to the Earth Summit f. Something about poverty,war, and violence g. Willingness to take action is necessary. h. conferences help people understand that there exist serious problems and there is still time to take action. para2 para7 para1 para5 para3 para6 para4 Reading: 1 .What are the “big three”? The “big three” refers to contaminated drin