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10 eco-friendly food trucks

By: Julie Knapp on Nov. 9, 2009, 5:24 a.m.
Sweetflow Mobile, Washington D.C.

Photo: Courtesy Sweetflow Mobile

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Sweetflow Mobile, Washington D.C.

You won’t have to feel guilty after buying a treat from this truck. Sweetflow Mobile serves frozen yogurt made from fat-free Stonyfield Farm organic yogurt and many of the fruit and crunchy toppings are locally sourced. Plus, an eco-friendly pulley system replaces the gas-powered generator most soft-serve trucks use, reducing emissions by 80-90 percent.