Obesity may be unsightly to some, but it has a real impact on the environment and our use of gasoline according to one economist. Dr. Richard McKenzie, a professor of economics at the University of California-Irvine and author of “Why Popcorn Costs So Much at the Movies: And Other Pricing Puzzles,” attributed the increased carbon footprint to overweight Americans. He explained there are environmental implications, specifically the effects of obesity on global warming and pointed the finger directly at former Vice President Al Gore. “I am concerned about environmentalists who are advising other people to cut out the lights, drive...