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).