Question

Briefly describe soil pollution, its causes and methods of control.

Answer 1

Soil pollution is the contamination of soil by harmful substances that reduce its quality and fertility and may make it unable to support plant and animal life.

Causes:

1. Industrial wastes, such as fly ash, chemical residues, dyes, acids and heavy metals, can contaminate the soil.
2. Excessive use of chemical fertilisers and pesticides pollutes agricultural soil and can harm humans, animals and soil organisms.
3. Improper disposal of domestic and urban waste, especially non-biodegradable plastics, adds pollutants to the soil.
4. Radioactive wastes and other hazardous chemicals can also contaminate land.
5. Open defecation, urination and spitting can introduce germs and parasites into the soil.

Methods of control:

1. Waste should be sorted and disposed of safely; recyclable materials should be recycled, and biodegradable waste should be composted.
2. Chemical fertilisers and pesticides should be used sparingly, and organic farming methods should be encouraged.
3. Industrial and hazardous wastes should be treated properly before disposal so that toxic substances do not enter the soil.
4. The use of plastic bags and other non-biodegradable items should be reduced, and littering should be avoided.
5. Proper sanitation should be provided, and open defecation should be prevented.