Why is manual sanitation labor necessary despite the use of machinery?

The necessity of manual sanitation labor alongside machinery is primarily attributed to certain limitations that machinery may encounter. In many environments, particularly in urban or densely populated areas, there are locations that are difficult for machines to reach, such as narrow streets, alleys, or spaces obstructed by obstacles. Manual collection allows sanitation workers to navigate these challenging areas efficiently, ensuring that no debris or waste is left behind. This thorough cleaning is essential for maintaining public health and aesthetics, as it prevents the buildup of waste that could lead to sanitation issues or hazards.

While other factors may play a role in the overall sanitation strategy, the need for thorough cleanliness in areas that machinery cannot adequately service makes manual labor a necessary complement to technological methods.