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A new study shows that walkable US cities are more affluent and better educated
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A team of researchers in the UK is turning urine into electricity
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As cities fight pollution and congestion, the car-free movement gathers speed
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The German carmaker takes on Toyota with the plug-in A3 Sportback e-tron
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With badges and social sharing, new apps turn saving fuel into a competition
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Is there room on the road for the self-balancing scooter?
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The year's most interesting vehicles have pedals, not pistons
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Transwheel is a self-balancing autonomous parcel-delivery drone
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The Mars rover has nothing on the Swincar E-Spider
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The Alex is a Tesla-inspired electric two-seater from Ireland
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It's pedals, not pistons, for this 25mph mini-hybrid
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This motorised platform is one part mobility solution, one part circus prop
