Complete the sentences with the correct forms 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. Millions of people in the world are threatened with __________ (starve).
4. Many countries must try and control the growth of the _____ __ (populate).
5. Many rare species are threatened with __________ (extinct).
6. Protecting the environment is essential to our ________ (survive).
7. While some countries get richer, the __________ (poor) in others gets worse.
8. Many of the gases produced by factories are ________ (harm) to our health.
9. The _________ (protect) of the environment is everyone's responsibility.
10.Exhaust fumes have _________ (damage) effects on the environment.