Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

fuels are sources of Hydrocarbons
They produce carbon dioxide and water when
is another name for burning
Too much sulphur dioxide release leads to production of rain
Acid rain can limestone
Acid rain can destroy the of plants
Natural gas is mainly
Polystyrene and PET are examples of
The raw material for their production is oil
Most plastics are non-
This means they remain in the environment for a very time