THE World Cup final in New Jersey nearly faced disruption because of air pollution drifting south from Canada. Smoke from wildfires in Northern Ontario blanketed Toronto in an orange haze for days and spread into New York and New Jersey. Two days before the Argentina-Spain final, US President Donald Trump threatened new tariffs on Canada, accusing it of "willful negligence" in preventing the wildfires that sent "filthy, polluted, and unhealthy air" into the US.