BMW’s alternative-fuel interests go beyond plug-in hybrids. Sure, the company has been building a battery-powered ecosystem, with cars like the city-styled i3 and i8 sports Coupe and Roadster serving as the testing grounds for tech that will later trickle down through the rest of the model line. But the company is also licensing its electrification technology to Karma’s recently resurrected luxury EV sports car, the Revero, in addition to luxury boats from Torqeedo and yachts from Hinckley.