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Environment

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Across
  1. 2. increases in the temperature of Earth's atmosphere and oceans
  2. 4. when all the trees in a large area are cut down
  3. 8. a type of animal which does not now exist
  4. 9. the weather conditions that an area usually has
  5. 12. a layer in the atmosphere that protects the Earth from dangerous radiation from the Sun
  6. 14. a type of energy that can produce light and heat, or make machines work
  7. 16. a reason for something to happen
  8. 17. containing poison
Down
  1. 1. energy, as solar or wind energy, that can replace traditional sources, as coal, oil, and natural gas
  2. 3. the number and types of plants and animals that exist in the world
  3. 5. a form of energy that can be produced as quickly as it is used
  4. 6. to keep someone or something safe from something dangerous or bad
  5. 7. a forest with a lot of tall trees where it rains a lot
  6. 10. damage caused to water, air by harmful substances
  7. 11. a car which has a normal petrol or diesel engine with an electric motor
  8. 13. when paper, glass, plastic can be used again
  9. 15. dioxide a gas that is produced when people and animals breathe out