Which of the following is a nonpoint source of water pollution?

Explanation

Key Points Pollution is any undesirable change in physical, chemical, or biological characteristics of air, land, water, or soil. Agents that bring about such an undesirable change are called pollutants . Pollution can be broadly classified into 4 types - Air pollution, Water pollution, Noise pollution & Soil pollution. Important Points Water pollution occurs when there is an addition of undesirable substances into water bodies . The sources of water pollution can be divided into 2 major groups: Point source - It refers to the single identifiable sources like discharge pipes from a factory or sewage plant. Non-point source - It refers to sources that do not originate from a single point. Example - agricultural run-offs. Factories and sewage treatment plants have proper drainage pipes leading to a water body for disposing their wastes and thus they are point sources of water pollution. Urban and Suburban lands cause water pollution by the field run offs and thus do not originate from a single point. Hence, they are non-point sources of water pollution.