Cincinnati Enqurier: Yes, even in this city symbolized by a flying pig and once called Porkopolis, officials worry about residents leaving too big of a carbon footprint. So as part of the Green Cincinnati Plan to make the city more environmentally friendly, proponents want you to at least think about choosing fruits and vegetables more, meat less. “Nobody wants Jeff Ruby to have to take out an ad that says, ‘Why are you hurting my restaurant?’ ” said Daniel Oerther, chairman of the University of …