Given below is a representation of a kind of pollution (a scene showing heavy traffic, horns and loudspeakers). Study the same and answer the questions that follow: Given below is a representation of a kind of pollution (a scene showing heavy traffic, horns and loudspeakers). Study the same and answer the questions that follow:
Name two soil pollutants.
Topic: Soil pollutants
Answer
- INDUSTRIAL WASTES (including heavy metals and chemical effluents).
- BIOMEDICAL WASTES from hospitals and laboratories.
(Also acceptable: pesticides and chemical fertilisers, plastics, domestic garbage.)
Two pollutants, one mark. Note that the question shifts from NOISE to SOIL — read it carefully, since it would be easy to go on answering about noise.
PESTICIDES are the most instructive example if you have room to explain one: being NON-BIODEGRADABLE and fat-soluble, DDT and similar chemicals accumulate along food chains by BIOMAGNIFICATION — becoming more concentrated at each trophic level, so that the animals at the top receive doses far higher than was ever present in the soil.
Soil pollution matters because crops grown in contaminated soil carry the pollutant into the human food supply.