I saw this booth and found Richard Heinberg's words echoing in my head. He had said something that boils down to "biodiesel only makes sense when you are diverting used grease from the landfills as a power source. If you grow crops to make biodiesel, you end up using more energy to make the fuel than you get out of using it." I really wish they had mentioned that fact in their materials, because without it the customer response could easily end up being way too enthusiastic for the sustainable supply of fuel.

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