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Surprisingly, the answer is “buying a fuel-efficient vehicle,” according to Sean Comey, spokesman for AAA of Northern California. “In the short term, people can reduce their consumption through relatively easy steps like telecommuting, carpooling, taking mass transit,” Comey says. While this in itself is a great idea, and would make a significant impact, “in the long term the biggest impact most of us can have is by choosing to drive a more fuel-efficient vehicle,” Comey said. Who knew?