Choose the best ending for each sentence.


Enter your answers in the gaps. When you have entered all the answers, click on the "Check" button.
   exhaust fumes      global warming      pollution      recycling      rubbish      shortage      smog      waste   
a) In cities the air is hard to breath because of car .
b) The earth’s climate is changing because of .
c) Not having enough of something is called a .
d) Air, sea and land can suffer from .
e) Throwing things away unnecessarily is called .
f) A mixture of smoke and fog is called .
g) Things which we throw away are called .
h) To avoid wasting things we can use .