What is a potential environmental impact of improper herbicide application?

The potential environmental impact of improper herbicide application primarily includes the contamination of water sources. When herbicides are improperly applied—whether through overuse, drift during application, or improper timing—they can run off into nearby streams, rivers, or groundwater. This contamination can have serious consequences for aquatic ecosystems, wildlife, and human health.

Pesticides in water can disrupt the habitat of aquatic organisms, leading to reduced populations of fish and other aquatic life. Additionally, when herbicides enter drinking water supplies, they pose risks to human health. It is critical for applicators to follow proper guidelines to avoid these environmental hazards and protect water quality.

The other options presented, such as improvement of biodiversity, increased agricultural yields, and enhanced soil moisture retention, do not accurately reflect the consequences of improper herbicide use. Instead, they imply benefits that are often associated with careful and correct herbicide application rather than the problematic effects that arise from misuse.