The Financial Post reports in its Thursday edition that Alberta Premier Rachel Notley is pouring cold water on B.C. Liberal leader Christy Clark's election promise to put a hefty carbon tax on thermal coal. A Canadian Press dispatch to the Post quotes Ms. Notley saying Wednesday, "We don't think she actually has the authority to do it and we would argue that ... something that would impact Alberta's export industry like that is of course bad news for Albertans." Ms. Clark is locked in a tightly contested provincial election campaign and has proposed the $70-per-tonne tax on coal shipped through B.C. as a way to get back at the United States for softwood lumber duties. Of the 6.6 million tonnes of thermal coal shipped last year through B.C. to China for power generation, 94 per cent came from the United States. Alberta also ships coal through B.C. and would be affected by any tax. On Tuesday, Ms. Clark, facing a challenge by Andrew Weaver's B.C. Green Party, defended her position. "We all need to be concerned about climate change," she said. "In Alberta, they say they're concerned about climate change. Here's an opportunity for them to them to help make sure that we all join that fight together."