Waste Not, Want Not
Sewage is a vital part of a circular economy—and we have the tech to make good use of it. Why don’t we?
A History of Human Waste as Fertilizer
In eighteenth century Japan, human excrement played a vital role in agriculture. Can similar solutions help manage waste today?
The Rise and Fall of Pay Toilets
Vespasian's most useful contribution to history may well have been creation of pay toilets.