C2 Part 1

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Across
  1. 3. Pollution such as smoke.
  2. 8. A lung condition made worse by air pollution.
  3. 11. A reaction that splits long hydrocarbons into shorter ones.
  4. 13. A resource that will not run out.
  5. 15. Using bacteria to purify copper from the soil.
  6. 16. _______ rain, a pollution caused by sulfur dioxide.
  7. 18. The source of oxygen in the air.
  8. 19. Global ______, an environmental problem where smoke blocks sunlight.
  9. 20. The source of most drinking water in the UK
Down
  1. 1. A greenhouse gas produced by cattle.
  2. 2. A saturated hydrocarbon with three carbon atoms.
  3. 4. A type of hydrocarbon with only single bonds.
  4. 5. A fossil fuel formed from ancient plankton
  5. 6. Extracting copper using plants.
  6. 7. Water that is safe to drink
  7. 9. The source of the Earth's first atmosphere.
  8. 10. Large amounts of CO2 dissolved into this.
  9. 12. The proper chemical term for burning.
  10. 14. Fractional ________, the process for separating crude oil into useful products.
  11. 17. A long chain like chemical made from lots of smaller chemicals called monomers.