Environment

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Across
  1. 6. A layer in the Earth's atmosphere that protects us from harmful rays
  2. 8. A type of energy that comes from sources that do not run out
  3. 10. The rise in Earth's average temperature over time
Down
  1. 1. A term used for species that are at risk of extinction
  2. 2. The presence of harmful substances in the environment
  3. 3. To process materials so they can be used again
  4. 4. When a species of animal or plant disappears completely
  5. 5. The process of cutting down trees in large areas
  6. 7. The usual weather conditions in a place over a long period
  7. 9. Coal, oil, and natural gas are examples of these energy sources