Which statement best defines a point source of pollution?

Which statement best defines a point source of pollution?

• A. Spread agricultural runoff
• B. A single factory dump
• C. Runoff from multiple lawns
• D. Air emissions from vehicles

Answer: (B)

A point source is a single, identifiable origin of pollution that enters the environment through a discrete outlet, like a pipe, ditch, or smokestack. The defining idea is that you can pinpoint exactly where the pollutants come from. A single factory dump fits this because it represents one specific discharge point. The other scenarios involve pollutants coming from many places or spreading across a landscape (agricultural runoff from fields, runoff from many lawns) or from dispersed sources in the air (emissions from numerous vehicles), which are examples of non-point or diffuse sources rather than a single, identifiable source.

A point source is a single, identifiable origin of pollution that enters the environment through a discrete outlet, like a pipe, ditch, or smokestack. The defining idea is that you can pinpoint exactly where the pollutants come from. A single factory dump fits this because it represents one specific discharge point. The other scenarios involve pollutants coming from many places or spreading across a landscape (agricultural runoff from fields, runoff from many lawns) or from dispersed sources in the air (emissions from numerous vehicles), which are examples of non-point or diffuse sources rather than a single, identifiable source.