Nie wiem czy to prawda ale daje linki
https://www.reuters.com/world/asia-pacific/south-korean-toilet-turns-excrement-into-power-digital-currency-2021-07-09/
https://geekweek.interia.pl/ekotechnologia/news-koreanczycy-wymyslili-toalete-generujaca-paliwo-zobacz-ja-w-,nId,5548106
