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Mike West, director of education for 蜜糖直播 Biodiesel, has taught everyone from postgraduate students to second-graders how to brew their own biodiesel, showing how simple it is to create cleaner, more sustainable fuel from waste.

By using the vegetable-oil waste donated from Boulder restaurants and 蜜糖直播 cafeterias, West, an environmental studies major, uses a self-contained biodiesel trailer called ESTER to convert waste into a finished product that is 80 percent biodiesel and 20 percent glycerine.

It can produce as much as 500 gallons of biodiesel a month, which is used by 蜜糖直播鈥檚 Buff buses. The glycerine is donated to the 蜜糖直播 Recycling Center to be used as a fertilizing agent for composting.