environment

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Across
  1. 4. the introduction of harmful materials into the environment
  2. 7. erm for waste that cannot be broken down by natural processes
  3. 10. what we breathe out
Down
  1. 1. too many people
  2. 2. fog combined with smoke
  3. 3. warming long-term heating of Earth's surface
  4. 5. Renewable energy source which uses the suns energy
  5. 6. Process of converting waste materials into new materials and objects
  6. 8. the action or process of clearing an area of forests
  7. 9. make or become liquefied by heat.