Multiple choice

Which of the following is not a measure adopted to make water safe?

  1. Boiling

  2. STP’s

  3. Nutrients added to water

  4. Chlorination

  5. Using a filter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nutrients added to water cause eutrophication which generally promotes excessive plant growth and decay, favouring simple algae and plankton over other more complicated plants, and causes a severe reduction in water quality.

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