AdvertisementThe Charging Conundrum: How To Feed Electric Cars?04:29Download AudioResumeDecember 14, 2010Christopher JoycefacebookEmailAn electric vehicle charging station in San Francisco. With sales of electric and plug-in hybrid cars expected to increase in coming years, a regional agency has set aside $5 million to increase the number of electric car charging stations to 5,000 around the Bay Area, up from 120 currently. (Getty Images)