Brewing biodiesel, once a quaint hobby for green-minded citizens and budding chemists, is becoming more mainstream, says The Washington Post. The spike in gas prices is making fryer oil, the messy aftermath of super spuds and mozzarella sticks, a hot commodity. Gabe Schwartzman, a high school senior from Montgomery County, can fill up the tank of his 1980 Volvo sedan for less than $20. And he’s happy to share his secret: "I take what would be thrown away and turn it into fuel"…

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