. Biodiesel pump. Woman filling her car with biodiesel at a petrol station. This fuel is partly made from recycled cooking oil. Biodiesel contains alkyl esters, which are made from vegetable oils such as rapeseed (Brassica napus) or animal fats. The continual growth of new oil based plants, which absorb carbon dioxide from the air through photosynthesis, means that biodiesel contributes less to global warming than fossil fuels do. Photographed near Mureck, Austria. MODEL RELEASED

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