Illinois Senator Barack Obama warns citizens at his 50th Town Hall meeting about gas guzzling, WPSD-TV reports. It was among many points made to the standing room only audience at the Metropolis Community Center. Obama spoke on everything from DC politics to global warming. He says part of the blame for the world's higher temperatures rests on gas guzzling vehicles. Obama says consumers can make the difference by switching to higher mileage hybrids. Today the Senator said, "It would save more energy, do more for the environment and create better world security than all the drilling we could do in...