Question

Water pollution is mainly caused by _____________.

• A. industrial sewage
• B. volcanic eruptions
• C. decay of organic matter
• D. rainfall

Answer 1

The correct option is A industrial sewage

Water pollution occurs when unwanted materials enter in to water, changes the quality of water and harmful to environment and human health. Discharge of industrial sewage, discharge of domestic waste, radioactive waste, population growth, excessive use of pesticides, fertilizers and leakage from water tanks are major sources of water pollution.