Coffee-Powered Vehicles?
Coffee grounds could be an inexpensive source of biodiesel, according to a study published in the Journal of Agricultural and Food Chemistry. Spent coffee grounds contain 11%-20% oil. (Other major sources of biodiesel are rapeseed oil, palm oil, and soybean oil.) The more than 7.2 million tons of coffee produced each year could yield about 340 million gallons of biodiesel. SOURCE: guardian.co.uk |
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