Question

Which of the following is/are responsible for soil pollution?

• A. Has a high BOD as it contains both aerobic and anaerobic bacteria
• B. Is processed by aerobic bactena and then anaerobic bacteria in secondary treatment in sewage treatment plants (STPs)
• C. When treated in STPs does not really require the acration step as the sewage contains adequate .
• D. Has very high amounts of suspended solids and dissolved salts.

Answer 1

Answer: (A), (B), (C)

The correct options are
A Has a high BOD as it contains both aerobic and anaerobic bacteria
B Is processed by aerobic bactena and then anaerobic bacteria in secondary treatment in sewage treatment plants (STPs)
C When treated in STPs does not really require the acration step as the sewage contains adequate .

Deforestation and landfills having non-biodegradable material and radioactive wastes from nuclear power plants buried deep inside the soil cause a lot of soil pollution. Many other indiscriminate human activities also contribute to soil pollution. Excessive use of fertilisers and pesticides in agricultural fields leads to the degradation of soil quality. Synthetic fertilisers and pesticides introduce very harmful compounds into the environment, contaminating soil, air, surface and underground water.