Toronto Star: Ottawa–A carbon tax would place an unfair burden on low-income Canadians, Jack Layton said yesterday. “Those advocating a carbon tax suggest that by making the costs for certain things more expensive, people will make different choices,” Layton said. “But Canada is a cold place and heating your home really isn’t a choice.” The New Democratic Party leader was at a fundraiser for an Ottawa homeless shelter to talk about poverty but used the platform to …