Globe and Mail: As the federal parties clash this fall over Liberal Leader Stéphane Dion’s proposed carbon tax, Premier Gordon Campbell is preparing a campaign to defend his own version of the toll on greenhouse-gas emissions. A fresh provincial government advertising blitz starting this month will aim to persuade taxpayers that Mr. Campbell’s carbon tax is putting more money into their pockets through matching income-tax cuts. The ads will likely be vying for attention with a federal …