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An Airbus employee presents three model airplanes in blue, white and red, made from starch using a 3D printing technique during the opening of 50th Paris Air Show, at the Le Bourget airport near Paris, June 17, 2013. In the future the company hopes to use this method to create prototypes and parts to cut down on current high levels of waste. The Paris Air Show runs from June 17 to 23. REUTERS/Pascal Rossignol

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