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Park District trucks running on greasy calories

Jun 30, 2011 7:28:04 PM- chicagotribune.com
Taste vendors' leftover oil being converted to biodiesel fuel

All those oily calories fueling the Taste of Chicago revelers who gobble churros, vegetable tempura and other fried delicacies also are powering Chicago Park District trucks, tractors and lawn mowers.

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