The Supreme Court has directed the government to make yamuna water quality atleast of Grade 'C' level which could be made available to people for drinking." According to above mentioned statement the meaning of Grade 'C' level is
  • 1

     clean water

  • 2

     slightly polluted water

  • 3

     moderately polluted water

  • 4

    highly polluted water

Answer:- 2
Explanation:-

 Earth surface has 71 % water and only 29% land. It has biodiversity both on land and water. Most of the water of the world are salty.

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