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A visit to a small hospital in northern Ghana changed Mahama Nyankamawu’s life forever. “It was dark, they had no electricity and the medicines they had had all gone bad,” recalled the 40-year-old, who went to the hospital after a car accident in 2014.

The experience inspired Nyankamawu to create Volta, a company that builds solar power projects for health clinics, schools and farms across Ghana.

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