They point to the United States’ huge historical emissions of heat-trapping gases from the burning of coal, oil and gas. The weeklong weather conditions that led to the fires in Ontario are now the type that can happen every six years or so, the report said. Hazardous smoke spread across both the United States and Canada, choking large cities such as New York. When asked Sunday about punishing Canada, Trump on Air Force One told reporters he has decided on a punishment, adding “you’ll find out about it soon.” “President Trump is pointing at the smoke while ignoring America’s fingerprints on the climate conditions behind it.”