Which one of the following is a cause of acid rains?

  1. Ozone
  2. Ammonia
  3. Sulphur dioxide
  4. Carbon monoxide


Acid rain is a rain that is unusually acidic, which means that it has elevated levels of hydrogen ions (low pH). It is harmful effects on plants, aquatic animals and infrastructure.

Acid rain is caused by emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx), which react with the water molecules in the atmosphere to produce acids - sulfuric acid and nitric acid.

The correct option is C.

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