Trump threatens to add smoke damage costs to tariffs on Canada

US President Donald Trump is hitting out at Canada for the wildfire smoke wafting south into the United States.

"We are holding Canada responsible for the fact that they are not properly maintaining their Forests, and Brush therein, and the United States is being unnecessarily invaded by filthy, polluted, and unhealthy air, the quality of which is dangerous, and totally unacceptable!" he wrote on his Truth Social platform.

Trump says he will call Canadian Prime Minister Mark Carney to demand an explanation over his country's "willful negligence" that has imposed an "incalculable cost" on the US via the smoke.

The "cost of this pollution must of necessity be added to the TARIFFS Canada is currently paying", Trump threatens.