Write critical notes on the following:
(a) Eutrophication
 (b) Biological magnification
(c) Groundwater depletion and ways for its replenishment

Explanation

(a) Eutrophication :
 (b) Biological magnification :
(c ) Groundwater depletion and ways for its replenishment : Groundwater depletion, a term often defined as long term water level declines key issue associated with ground water use. Many areas of India experiencing ground water depletion.
The most severe consequence of excessive ground water pumping is that the water table, below which the ground is saturated with water, can be lowered. If ground water level declines too far, then the well owner might have to deepen the well, drill a new well, or at least attempt to lower the pump.