Canadian Press: Unhappiness over B.C.’s landmark carbon tax is prompting a northern revolt, with the mayor of Williams Lake saying his community won’t pay the tax on municipal fuel purchases unless the Liberal provincial government proves its claims that the tax will be revenue neutral. Mayor Scott Nelson, who is expecting his council to endorse the plan at its May 26 meeting, says he has left messages with or talked to the mayors of 12 other northern communities about joining the protest, which …