What is a potential environmental impact of improper pesticide use?

The potential environmental impact of improper pesticide use is most accurately characterized by its ability to lead to contamination of soil and water. When pesticides are misapplied or used excessively, they can leach into the soil or be washed away by rain into nearby water bodies. This not only harms aquatic life but can also disrupt ecosystems and contaminate sources of drinking water, posing risks to both human health and the environment.

Improper use can lead to pesticide residues remaining in the soil, affecting microbial activity and soil health, which are essential for nutrient cycling and plant growth. While improved crop yield, enhanced soil fertility, and increased pollination are positive outcomes that can be achieved through proper agricultural practices, they are not directly linked to the consequences of improper pesticide use, making them less relevant in the context of this question. The key focus is on the negative repercussions that improper pesticide application can have on the environment, particularly through contamination pathways.