Complete these sentences with the correct form of the words in brackets: 1 what can we do to reduce the ……… (pollute) of the atmosphere? 2 the change in the climate has produced ……….. (disaster) floods. 3 many rare species are threatened with …….. (extinct). 4 many of the gases produced by factories are ………. (harm) to our health. 5 exhaust fumes have ………. (damage) effects on the environment. 6 many countries must try and control the growth of the ……….. (populate). 7 protecting the environment is essential to our ……… (survive). 8 the ………. (protect) of the environment is everyone’s responsibility. 9 while some countries get richer, the ………. (poor) in others gets worse. 10 millions of people in the world are threatened with ………. (starve).