Sven Thesen describes himself as an electric car evangelist. His conversion began several years ago while he was working as an air-quality consultant in California. He switched diesel agricultural pumps over to electric as part of a program to cut air pollution and says he witnessed something incredible, an 80% reduction in greenhouse gas emissions. He began to think it might be possible to create similar efficiencies for your average family car.
(Online-only story published in August 2016. Read the full article at bbc.com/capital.