And then there is the highly questionable use of raw sewer sludge as a fertilizer. Yes, you heard me
right. In some countries, raw, uncomposted and untreated human waste is applied directly to crops and
soil, a practice known as "night soil" since it's typically applied at night. The risk of disease is obvious
and high and this practice should never be confused with "humanure", a long, highly involved process
of decomposing human waste into a safe resource.