Which of the following is a non-point source of pesticide pollution?

A non-point source of pesticide pollution refers to pollution that does not originate from a single, identifiable source. Instead, it comes from diffuse sources that can be scattered over a broader area. Runoff from agricultural fields is an example of a non-point source because it occurs when rainwater or irrigation water moves across the fields, picking up pesticides and other pollutants as it flows into nearby waterways.

This runoff can vary in volume and composition based on a number of factors, such as land use practices, weather conditions, and topography, making it difficult to pinpoint a specific location responsible for the pollution. Consequently, efforts to manage and mitigate this type of pollution often need to be implemented at the landscape or watershed level rather than targeting a single discharge point.

In contrast, other choices represent point sources of pollution, which can be traced back to specific locations or facilities, such as leakage from gas stations, industrial discharges, and sewage treatment plant emissions. Each of these sources releases pollutants from a defined point, making them easier to regulate and control compared to the more widespread issue of non-point source pollution like agricultural runoff.