As we approach the heart of the winter heating season, here’s a summary of what Illinois’ major utilities are charging for natural gas right now, compared with last November: Ameren Zone 1 (Formerly AmerenCIPS): 53.482 cents per therm (November 2012: 64.76 cents per therm) Ameren Zone 2 (Formerly AmerenCILCO): 53.673 cents…...