“Excessive use of chemicals such as insecticides and pesticides causes a threat to Ecology.” Explain with reason.

Q. “Excessive use of chemicals such as insecticides and pesticides causes a threat to Ecology.” Explain with reason.
Ans. (i) Excessive use of fertilizers and pesticides when washed away causes water pollution.
(ii) They can be poisonous to many plant and animal species and cause environmental pollution.
(iii) They may lead to eutrophication.
(iv) They may result in biological magnification.

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