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2. Why is putting polymers in landfill sites a bad thing:

  • costs money
  • they are non-biodegradable
  • we can't reuse them

3. Calcium oxide + water -->

  • calcium hydroxide - fizzing/bubbling.
  • carbon dioxide + calcium - fizzing/bubbling.
  • calcium dioxide and hydrogen - fizzing/bubbling.

4. What is acid rain caused by:

  • people throwing acid into the sky!!!
  • pollutants from fossil fuels, such as sulphur dioxide
  • greenhouse gases

5. Uses of chlorine:

  • only used in swimming pools
  • treating water, manufacturing of bleach, manufacturing of PVC as it makes it more heat resistant.
  • toxic gas that can cause explosions
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