Complete the sentences using the correct forms of the words in 1

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!
   coal      fossil fuels      released      renewable      waste   
1. Wind and sunlight are examples of sources of energy.
2. The world produces more than two billion tonnes of solid every year.
3. Governments need to limit the amount of greenhouse gases that is into the air.
4. Her grandpa is now suffering from ill health after many years of working in the industry.
5. The burning of like coal and gas has led to an increase in the amount of CO2 in the atmosphere.