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Volkswagen has made a car it says can travel 313 miles on a gallon of diesel, and that emits just 24 grammes of carbon dioxide per kilometre travelled.
The XL1, which seats two adults, combines a 0.8 litre two cylinder diesel engine with an electric motor.
The car is constructed around a carbon fibre reinforced polymer monocoque to reduce the weight to just 795 kilos. Read the full article at BBCNews.com.