It has been said that “everything that's old is new again,” and in this commentary we examine environmental sustainability with an eye on history. Not surprisingly, many of today's global environmental issues are the same problems that have dogged society for thousands of years and, remarkably, many of the proposed solutions are the same tired, unimaginative standbys, too. For example, society started using water to dispose of sanitary waste more than 2,000 years ago, and today we continue to use our waters to convey sanitary waste, only now we spend energy and resources to clean the water because we are running out. First, it was oxygen demand, then pathogens, then nutrients, and now drugs, hormones, and personal care products. What if these pollutants never reached our waters to start? What if the low-flow toilet was the no-flow toilet?