President Donald Trump Accuses Canada of Air Pollution

Smoke from wildfires raging across Canada’s forests has crossed the U.S. border, blanketing the skies over Washington, D.C., and apparently irritating U.S. President Donald Trump.

On July 17, Trump posted on the social media platform Truth Social, “Canada is responsible for failing to properly manage its forests. The U.S. has been invaded by unnecessary, filthy, polluted, and unhealthy air, with air quality reaching dangerous and unacceptable levels,” adding, “The cost of this air pollution should be added to the tariffs Canada is currently imposing.” He also stated his intention to call Prime Minister Mark Carney to discuss solutions.

According to the Canadian Wildfire Management Center, over 800 cases of wildfires have erupted across Canada this month, blanketing the atmosphere with thick smoke. As sunlight reacts with smoke particles, the sky appears a hazy yellow, similar to yellow dust. Most wildfires were caused by lightning strikes and dry weather, igniting in deep forest areas untouched by humans. While Canadian provinces have mobilized all available personnel to combat the fires, suppression efforts remain challenging due to the scale and intensity of the flames.

Approximately 25% of the active fires are in Ontario, a southeastern Canadian province bordering the U.S. East Coast. Southward winds have carried smoke toward major eastern U.S. cities, including Detroit, Chicago, Washington, D.C., and New York. Over the weekend, residents in these areas donned masks as air quality remained severely degraded.

Concerns arose as thick smoke hovered over MetLife Stadium in New Jersey, U.S., where the 2026 FIFA World Cup final between Argentina and Spain is scheduled for June 19 (local time). Authorities anticipate minimal impact on the Sunday match, as air quality is gradually improving.

Amid the climate crisis, rising temperatures and decreasing humidity have increased wildfire frequency worldwide. Once ignited, fires spread rapidly. Spain is currently battling its largest wildfire of the year in Zaragoza, northeastern Spain. France is investigating a man suspected of arson while extinguishing an “unprecedented-scale” fire in the Fontainebleau forest southeast of Paris. The UK has banned steam train operations in England and Wales due to concerns over fire outbreaks during heatwaves.