What is an essential consideration when selecting a site for a landfill?

Selecting a suitable site for a landfill primarily hinges on environmental and public health concerns, which is why the proximity to water sources is a critical factor. When evaluating potential landfill locations, it is essential to ensure that the site maintains a safe distance from lakes, rivers, and groundwater sources. This is crucial to prevent contamination of water supplies due to leachate, which can arise from decomposing waste. If a landfill is too close to water sources, there is an increased risk of harmful substances seeping into the water, which can have dire consequences for both ecological health and community safety.

In contrast, while considerations like proximity to residential areas, availability of local labor, and land acquisition costs are important for the overall logistics and economics of landfill operations, they do not take precedence over the need to protect water resources. Proper distance from water sources ensures that both human populations and the surrounding environment are safeguarded from potential pollution. This highlights why option B is vital in the site selection process for landfills.