Culture

The Toilet of Tomorrow Will Do More Than Flush Waste

It will help modernize old or inadequate city sewage systems that harm public health—especially in developing countries.
A public toilet in Dhaka, Bangladesh.Andrew Biraj / REUTERS

When we think about the most dire threats to our planet, poor sanitation rarely tops the list. And yet it’s a significant (and in some cases immediate) contributor to sickness and pollution in both rural and urban areas.

Every day, around 2 million tons of human waste are disposed of in water channels. Among other contributing factors, this sanitation problem limits the availability of uncontaminated drinking water—especially in developing nations, which often lack the proper treatment and drainage facilities. Overall, 2.5 billion people around the world currently lack access to improved sanitation, and 27 percent of urban dwellers in developing nations do not have access to piped water in their homes.