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Modified PriusTired of spending $2.85 on gas every other day? Perhaps, you should invest in a Toyota Prius hybrid and a soldering iron.

Ron Gremban, an electrical engineer and committed environmentalist, modified the electrical system in his Prius to achieve an incredible efficiency of 250 miles per gallon. With $3,000 and a few months of tinkering, he added a ‘plug-in’ feature to his car that allows him to store energy while it is parked in his garage.