Experts Criticize Trump for Blaming Canada Amid US Air Crisis

WHO:

The Guardian - Trump, Mark Carney (Canada’s Prime Minister), Bernie Moreno (Republican senator from Ohio), Michael Mann (climate scientist at the University of Pennsylvania), Marshall Burke (environmental policy expert at Stanford University), Lori Daniels (ecologist and wildfire expert at the University of British Columbia).

WHAT:

The Guardian - Trump accused Canada of “poisoning” US air with smoke from nearly 1,000 Canadian wildfires.

The Guardian - Trump announced 50% tariffs on Canada.

The Guardian - More than 8.1 million acres (3.3 million hectares) have been consumed by fires across Canada.

Fox News - The FIRE Act and FENCES Act aim to reform prescribed burns and protect states from penalties for Canadian wildfire smoke crossing American borders.

WHERE:

The Guardian - Smoke from wildfires has affected cities including New York, Washington DC, Detroit, and Toronto.

The Guardian - Canada has more than a quarter of the world’s boreal forests, spanning about 1.2 billion acres.

WHEN:

The Guardian - Trump raised the issue with Mark Carney at the World Cup final on June 19.

WHY:

The Guardian - Trump claimed the US is being “unnecessarily invaded by filthy, polluted and unhealthy air.”

The Guardian - Experts attribute the wildfires to climate change rather than mismanagement of forests.

HOW:

The Guardian - Trump suggested that Canada should pay damages or face tariffs for the smoke affecting the US.

The Guardian - Experts argue that the current wildfires are worsened by a severe heat dome that expanded from the US into Canada.

(UPDATED July 24, 2026 22:21 UTC)

President Trump has accused Canada of "poisoning" U.S. air with smoke from nearly 1,000 wildfires that have consumed more than 8.1 million acres across the country, prompting him to announce a 50% tariff on Canadian goods. He raised these concerns with Canadian Prime Minister Mark Carney during the World Cup final on June 19, suggesting that Canada should either pay damages or face tariffs for the smoke affecting U.S. cities like New York and Washington, D.C. Experts attribute the severity of the wildfires to climate change, exacerbated by a heat dome that has spread from the U.S. into Canada.