Choose the word which best fits each gap

V. Choose the word which best fits each gap.

Dear Mayor Glenn,
This email is about the advantages of new renewable energy sources. As you may know, 80% of the electricity for the town comes from the coal plant, which is the cause of (31)________ in the city. After researching new technologies, I suggest the city develop more renewable sources like (32)________, wind, and nuclear power. Progress in the last couple of years has made renewables better energy sources than non-renewables like coal and gas. For example, solar panels have become less (33)________ than coal, cheap to build, and cleaner for the environment. (34)________ have gotten larger, make less noise, and produce more energy with less wind. Nuclear power can sometimes be (35)________, but it’s cheap to run.

31. A. pollution                      B. expense                              C. noise                                   D. weather

32. A. oil                                 B. coal                                     C. gas                                      D. solar

33. A. dangerous                     B. noise                                   C. expensive                           D. advantage

34. A. Hydropower                 B. Wind turbines                    C. Solar panels                       D. Nuclear

35. A. safe                               B. expensive                           C. advantage                           D. dangerous