They have.
In my province of Saskatchewan, in the southern part of the province, there's what's known as the Bakken oil field. Half of this oil field is on the Canadian side of the border, and half is on the American side. As I'm sure you're aware, the federal government recently imposed a carbon tax on the province of Saskatchewan.
I'm wondering if there are any requirements in the new NAFTA for oil drilling operations in North Dakota or Montana to have to pay a carbon tax or a similar fee the same way that this is the case on the Canadian side of the border.