The provincial and federal governments will be squaring off in court over the carbon tax this week.
Premier Doug Ford has called the federally implemented carbon tax a 'tax grab' and is asking the Court of Appeal to decide if the law is constitutional.
Politicians in Saskatchewan, Manitoba, and New Brunswick share his feelings, and are gearing up for their own legal battles.
In fact, Saskatchewan is already awaiting the results of their challenge.
Meanwhile, federal politicians maintain the move is necessary to combat climate change, and note residents will be receiving a rebate on their income taxes to help offset the cost.
The carbon tax came into effect in Ontario at the beginning of this month, after the Ontario PC's refused to come up with a carbon pricing model of their own.