Cities in Asian countries have high air and noise pollution from petrol- and diesel-powered three-wheelers called auto rickshaws or tuk-tuks. Resting on three small wheels—one in front, two in the rear—these vehicles usually sport a small cabin for the driver in the front and seating for up to three in the rear. Solar-powered or electric versions that are silent and easier on the environment are already coming onto the market. Britain’s Ultra Motor is using the design of one of its Russian engineers to make its own eco-friendly version of the rickshaw, pictured here. The design combines the British company’s motor technology with a compressed natural gas generator that charges the battery as the rickshaw moves, using 50% less fuel than conventional models. Ultra Motor plans to introduce the model in Asia in late 2009.