It is estimated that around 2.6 billion people have no proper sanitation. A group of students at the Massachusetts Institute of Technology have developed a low cost, modular sanitation solution which they call "Sanergy".

The project, which would be operated and maintained by locals and the waste transported to nearby processing plants, through a network of "micro-franchises". Biogas produced from the waste will be used to create electricity and what’s left of the human waste turned into fertilizer.

The group has set up a pilot project in the slums of Kenya where more than 10 million live without proper sanitation.