coffee grounds

Give Your Truck a Caffeine Jolt: Spent Coffee Grounds as a Biodiesel

The world produces an insane amount of coffee each year, somewhere around 16 billion pounds.Β  The grounds are soaked in water, that’s the end of their life.Β  They are not really consumed, only used for a small fraction of their delightful oils and stimulating phytochemicals (read: caffeine).Β  If the grounds are lucky, maybe they end …

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