The Car That Uses Urine to Save the Planet

Mazda’s latest four-wheel-drive likes a wee drink. The Mazda CX-7 uses a special man-made liquid similar to human urine to reduce emissions of oxides of nitrogen (NOx). The compound, called AdBlue, is a mixture of roughly one-third pure urea and two-thirds demineralised water.(theage.com.au)

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