Question

(a) Improper waste disposal is a curse to the environment. Explain. (b) Why are crop fields considered as artificial ecosystems? (c) Farmers are using pesticides on the crop plants, but the chances of accumulation of harmful chemicals is greatest in human beings. Why? Name the phenomenon.

Accepted Answer

0. (a) Non-biodegradable waste persists in the environment, pollutes soil/water, clogs drains, harms fauna, and disrupts food chains. (b) Crop fields are man-made, managed by humans (sowing specific crops, adding fertilizers, irrigation), lacking natural biodiversity and self-sustainability. (c) **Biological Magnification:** Non-biodegradable chemicals increase in concentration at successive trophic levels. Since humans occupy the top trophic level in food chains, chemical concentration reaches its maximum in humans.

Waste Disposal, Ecosystems, and Biomagnification

Explanation

Practise this under board exam conditions