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Questions 6.7

  1. How does the pH of sea water change as the amount of carbon (IV) increases and why?

  2. What would be some of the effects of pH change of sea water?

  3. Referring to the carbon cycle in Figure 6.7, suggest two possible methods which may be used to reduce the amount of carbon (IV) oxide already in the atmosphere or being released to it.




Answers to Questions 6.7

  1. pH decreases. With more carbon (IV) oxide, water becomes more acidic.
  2. Risk to the lives of sea (aquatic) animals and vegetation that are sensitive to pH change.
  3. Plant more green plants. Use non-carbon sources of energy (solar energy, electricity). Encourage decay of organic matter.