Water Quality Quotes
The major reason for not yet harvesting waste is the labor, caital, and energy costs of recycling relative to the value of the resource is too high. Technology improvements and greater shortages continuously change the equation in favor of harvesting more and more resources.
Many people when they first read this quote assume that it came from some counter-culture radical. It did, but he was a President of the United States.
Manava Dharma Shastra. This text is a part of the Hindu Holy Texts. Hindus believe that Manu was a prophet whose text is revealed or inspired. This is one of the earlier prescriptions to maintain public health.