What could be the consequence of not mixing and loading pesticides away from water sources?

Not mixing and loading pesticides away from water sources is crucial because it directly addresses the risk of water contamination. When pesticides are mixed and loaded near water bodies, there is a significant chance that spills or overspray could occur, leading to these chemicals entering the water supply. This can have devastating effects on aquatic ecosystems, wildlife, and even human health if the contaminated water is used for drinking or irrigation. By ensuring that mixing and loading occur at a safe distance from water sources, the potential for such contamination is minimized, thereby protecting both the environment and public health.

The other choices, while they may reflect certain agricultural benefits or environmental concerns, do not relate directly to the immediate risks posed by mishandling pesticides near water bodies. Increased crop yield, better pest control, and reduced air pollution may occur through various practices and innovations in agriculture but do not address the critical issue of protecting water sources from contamination.