Environmental vocabulary

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Across
  1. 4. Long-term heating of Earth's climate system
  2. 6. Car exhaust, burps and radio broadcasts are all examples of ...
  3. 8. Long-term change in the average weather patterns
  4. 9. Fog from smoke
Down
  1. 1. Introduction of harmful materials into the environment
  2. 2. Energy from the sun
  3. 3. Organic material that can be added to soil
  4. 5. Converting waste materials into new materials
  5. 7. Gases