Guardian: Every day at around 6pm, 40 families living in a remote corner of Andhra Pradesh in southeast India a 6km walk from the nearest road would be swallowed by darkness. With no access to electricity, sunset was a non-negotiable curfew going outside was dangerous, people couldnt cook and children were unable to do their homework. This changed in April 2015 when Liter of Light, a project that transforms plastic bottles into simple solar lights, introduced solar-powered street lamps to the villages....