The developers of a solar lamp that aims to replace kerosene-burning lights in developing countries have won a prestigious environmental award.
D Light Design says its lanterns, which sell for around $10 (£7), contribute to the reduction of carbon emissions.
One of the runners-up for the Ashden Award for Sustainable Energy was the Rural Energy Foundation (REF) for promoting solar energy in Africa.
More than 70% of sub-Saharan Africa has no access to electricity.
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