France, Feb. 4 -- Sanitation woes are helping to fuel green energy in Kenya's largest slum, where human excrement is being transformed into an asset.

Kenya's growing urban population has made it difficult for the government to tackle sanitation, with an urgent need for innovative solutions.

In Kibera slum, seven kilometres from Nairobi, human waste is being turned into biogas thanks to initiatives supported by the community, the Health Ministry and others.

Tree Hill School is one of nine bio centres - sanitary blocks that use a biodigester system to treat waste and produce biogas - that has been opened.

It has backing from theUmande Trustcivil society group and other partners including the French Development Agency.

Benazir Douglas, ...