Chief source of water and soil pollution is

Answer: Option D

Chief source of water and soil pollution is mining, thermal power plant and agroindustry.
Water pollution is the contamination of water sources by substances that make the water unusable for drinking, cooking, cleaning, swimming, and other activities.
Soil pollution as a part of land degradation is caused by the presence of xenobiotic chemicals or other alterations in the natural soil environment. It is typically caused by industrial activity, agricultural chemicals or improper disposal of waste.