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.