And this is why sanitation has to be rethought. It's time to recycle human excrements and get rid of the expensive sewage system. At least in Germany there are a few startups exploring this idea with help of modern technology. Here is a good article about it: https://daily.jstor.org/a-history-of-human-waste-as-fertiliz... and a German podcast where I first heard about it: https://www.deutschlandfunkkultur.de/projekt-sanitaerwende-w...