Environmental issues

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Across
  1. 2. when the air, water, or land is made dirty by harmful substances
  2. 4. long-term changes in weather patterns around the world (two words)
  3. 5. non-biodegradable rubbish that pollutes oceans and harms animals (two words)
  4. 7. cutting down too many trees in forests
  5. 9. an adjective used to describe energy sources that never run out, such as the sun and wind
Down
  1. 1. the gradual increase in Earth's temperature due to greenhouse gases (two words)
  2. 3. animals or plants that are at risk of disappearing forever (two words)
  3. 6. coal, oil, and gas that we burn for energy (two words)
  4. 8. a large, uncontrolled fire that spreads quickly in nature