It is common for street vendors in China to cook food in Gutter Oil, which is made from processed sewage.<ref>https://www.youtube.com/watch?v=zrv78nG9R04</ref> | It is common for street vendors in China to cook food in Gutter Oil, which is made from processed sewage.<ref>https://www.youtube.com/watch?v=zrv78nG9R04</ref> |