Canadians would see their hydro and natural-gas bills spike dramatically should the three opposition parties succeed in forcing the government to comply with Kyoto, Environment Minister Rona Ambrose warned Thursday. Ms. Ambrose was appearing before the Commons environment committee for the first time since she was sworn in to Prime Minister Stephen Harper’s cabinet in February. Though she outlined the broad direction of her fall environmental plan and gave a few more hints as to where the government is headed, opposition MPs left frustrated that she did not provide any new information.