>>Before municipal sewer systems, excreta piled up in the privies of people’s homes—essentially a deep hole in the ground... When the privies were eventually fi

>>Before municipal sewer systems, excreta piled up in the privies of people’s homes—essentially a deep hole in the ground... When the privies were eventually filled, that’s when the night soil men were called in. This period in U.S/U.K history is repeating itself in the developing world as the urban population explodes. Africa's booming cities face a severe toilet crisis https://apnews.com/article/c225ff70420846489892ea206ecca6d1 https://apnews.com/article/c225ff70420846489892ea206ecca6d1 One innovation from Uganda: https://www.globalcitizen.org/en/content/feces-poop-fuel-uganda-energy-sanitation/ https://www.globalcitizen.org/en/content/feces-poop-fuel-uga... Surprisingly first-word Japan still has about 30% of it's population unconnected to a sewer. For those folks human waste collection (with vacuum trucks) is still a thing. http://www.jsanic.org/inasia/japanhistoryx.html http://www.jsanic.org/inasia/japanhistoryx.html