What must be done to prevent pesticide waste from contaminating water?

Preventing pesticide waste from contaminating water involves taking specific actions to ensure that hazardous substances do not enter water sources. The correct answer emphasizes the importance of not pouring pesticides down drains, as doing so can lead to direct contamination of groundwater and surface water systems. Pouring pesticides down drains can introduce harmful chemicals into water supplies, posing significant risks to human health and the environment.

In contrast, disposing of pesticides in landfills may seem like a viable option, but it can lead to leaching into the soil and potentially into water sources if the landfill is not properly managed. Allowing pesticides to evaporate is not a safe or effective practice since volatile components can still pose risks through inhalation or environmental deposition. Simply storing pesticides in a shed does not address the need for proper disposal; safe storage is crucial, but it does not prevent contamination if the pesticides are ultimately disposed of improperly.

By choosing not to pour pesticides down drains, individuals can effectively minimize the risk of water contamination and play a crucial role in protecting their local water sources.