Mama Sara Obama, the US President's grandmother, flicks on the lights after a Greenpeace team installed a solar power system at her home in Kogelo Village. The solar installations are part of a 20 day renewable energy workshop hosted by Greenpeace's Solar Generation with 25 participants from the Kibera Community Youth Programme and community members of Nyang'oma Kogelo.08/19/2009
© Greenpeace / Richard Dobson