The dry weight of the average person's feces is 11 kilograms [about 24 pounds] per year. Toilets use 18 tons of water to transport those 11 kilograms, dispersing pathogens in 18,000 liters of water in the process. Flush toilets are not a sensible idea.

The dry weight of the average person's feces is 11 kilograms [about 24 pounds] per year. Toilets use 18 tons of water to transport those 11 kilograms, dispersing pathogens in 18,000 liters of water in the process. Flush toilets are not a sensible idea.