A farmer cultivating his land near the village pond was also drawing water from it for irrigation. He used insecticide excessively to protect his crops and improve the harvest. Over a period of time his agricultural growth improved vastly. But the pond lost its aquatic life.
a) Contrast the activity in plants and aquatic life with insecticide.
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When this insecticide particles reach near or mix up with pond it act as a poison for aquatic animal and kill them