It is not uncommon to hear Bangalore residents (often from the wealthier parts of the city) bemoaning the loss of trees and green space that has occurred as Bangalore rose to be the Silicon Valley of India.
But what about the people who live in the 640 recorded slums¹ across the city? What access to nature and greenery do they have and how do they use it?
Sanitation has long been a critical, but somewhat unfashionable issue in health and rural development, so it is heartening to see the Bill and Melinda Gates Foundation putting their substantial resources behind technological change and innovation in this field with their “Reinvent the Toilet” fair.
The minimum requirements for the competition were that the toilets must operate without running water, electricity or a septic system, must not discharge pollutants and should capture energy or other resources. The winning design from the California Institute of Technology certainly fits that bill, as it is a solar-powered toilet that generates hydrogen and electricity.