How is there pollution in the soil?

Answer 1

1. Accidental spills and leaks during storage, transport or use of chemicals and diesel at gas stations);
2. Foundry activities and manufacturing processesthat involve furnaces or other processes resulting in possible dispersion of contaminants in environment;
3. Mining activities involving crushing and processing of raw materials (such as mining activity);
4. Agricultural activities involving the spread of herbicides/pesticides/insecticides and fertilizers;
5. Transportation activities (e.g., vehicle emissions)
6. Dumping of chemicals (accidental or intended - such as illegal dumping);
7. Storage of wastes in landfills (which may leak to groundwater or generate polluted vapors)

Answer 2

It is alternate in soil. It is caused by pesticides like insecticides (e.g., DDT, BHC etc.), herbicides(sodium chlorate, sodium arsenate benzipam) and fungicides.