Article Photos: WHY IT MATTERS: Issues at stake in election 22/33

  FILE - In this Jan. 19, 2012 file photo, smoke rises in this time exposure image from the stacks of the La Cygne Generating Station coal-fired power plant in La Cygne, Kan. This year the nationís weather has been hotter and more extreme than ever, federal records show. Yet there are two people who arenít talking about it, and they both happen to be running for president. In 2009, President Barack Obama proposed a bill that would have capped power plant carbon dioxide emissions and allowed trading of credits for the right to emit greenhouse gases, but the measure died in Congress. (AP Photo/Charlie Riedel, Filr