Barely a week goes by without news headlines announcing yet another innovative way of making biofuel, something that was lauded as remarkable only at the beginning of the year but has since fallen from grace.

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A group of Spanish developers working for a company called Ecofasa just announced a new biofuel made up from trash. This isn't a biodiesel made from used frying oil; instead, it's made from general urban waste which is treated by bacteria.

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