In the wee hours of June 2, two men exited an unmarked car in an alley outside a Boston-area restaurant. Under the cover of darkness, they removed their tools: a pump and a plastic siphon. Next, they went to work stealing approximately $500 in used restaurant grease, reports The Boston Globe.Yes, restaurant grease.As we reported last fall, eateries the country over have been hit with a wave of thefts in which eco-criminals make off with cooking grease, which is then sold to recyclers, who in turn sell the processed biodiesal to the transportation industry.Read More... More on Energy