Q. Which of the following is/are considered as point sources of water pollution?
2. Sewage treatment plants
3. Oil tankers
4. Acid deposition
5. Livestock feedlots
Select the correct answer using the codes given below:
Explanation: Point and non-point sources of water pollution. Point sources are pollutants that are discharged at specific locations through pipes, ditches or sewers into bodies of surface waters. Ex: Factories, sewage treatment plants, abandoned underground mines and oil tankers.
Non point sources these pollutants cannot be traced to a single point of discharge. They are large land areas or air-sheds that pollute water by runoff, subsurface flow or deposition from the atmosphere. Ex: Acid deposition, runoff of chemicals into surface water from croplands, livestock feedlots, logged forests, urban streets, lawns, golf courses and parking lots.