Reuters: Canadian Trade Minister Michael Fortier rejected the notion on Thursday that some countries might slap tariffs on Canadian products because of the Conservative government’s weak climate change policies. Liberal leader Stephane Dion, campaigning for the Oct. 14 general election, warned on Thursday that Canada could face tariffs on its exports if it did not take tougher action to combat climate change. Dion’s major campaign promise is to impose a tax on carbon emissions to cut …