Question

A pond contains clean water. Which of the following activities will produce least pollution of water?

• A. Washing clothes in the pond
• B. Animals bathing in the pond
• C. Washing motor vehicles in the pond
• D. Swimming in the pond

Answer 1

Answer: (D)

Swimming in the pond

Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). This form of environmental degradation occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds.

So washing clothes, motor vehicles or bathing animals will discharge detergent and dirt into the clean water, hence polluting it, while swimming in the pond doesn't discharge that much pollutants or dirt into the clean water.