Pollutant released due to human activities (like effluents from industries and homes) can radically accelerate the ageing process of the water body. (a) Explain how does this process occurs during natural ageing of lake. (b) Give the term used for accelerated ageing of water bodies. Also give the term used for the natural ageing of lake.

Pollutant released due to human activities (like effluents from indust

1.	Pollutant released due to human activities (like effluents from industries and homes) can radically accelerate the ageing process of the water body. (a) Explain how does this process occurs during natural ageing of lake. (b) Give the term used for accelerated ageing of water bodies. Also give the term used for the natural ageing of lake.
Answer» The phenomeon is eutrophication. More nutrients in water, aquatic life increases organic remains deposited on lake bottom, lake grows shallower and warmer, gradually transforms into land due to deposition of silt and organic debris. Cultural or Accelerated eutrophication Natural ageing is Eutrophication.