Raya Salter remembers the yells as a child when she asked her mother to turn up the heat in the winter: “Put on a sweater. Put on two sweaters. Here’s an extra blanket. That’s gonna make it work because the heat is not going up.

But, at the same time, no option is off the table—including restrictions on energy and natural resources. Because of the highly-linked energy systems of the two countries, such a move could wreak significant havoc on the U.

Despite emerging risks concerning U.S. domestic potash prices due to trade tensions with Canada, the rising costs of N-based fertilizers present a more immediate threat to U.S. agriculture, as these are closely linked to elevated domestic natural gas prices,