Trump proposes air filter barrier on U.S.-Canada border amid smoke concerns
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President Donald Trump suggested building a large air filtration structure along the U.S.-Canada border and warned of tariffs in response to Canadian wildfire smoke, while Canadian officials have not commented.
President Donald Trump posted an AI-generated image depicting a massive pleated air filter spanning the U.S.-Canada border, labeled the "North America Air Filter Barrier" with the slogan "Clean Air. Clear Borders." The illustration shows clear skies on both sides of the imagined structure. Trump said the United States would consider imposing a tariff on Canada because of smoke from Canadian wildfires that has affected air quality in several U.S. cities.
The remarks follow a recent 50 percent tariff on a range of Canadian goods that Trump justified as retaliation for what he described as Canadian "discrimination" against U.S. commerce. Earlier this week, he told reporters in the Oval Office that a new tariff would be levied because of the smoke, according to CBC/Radio-Canada.
Canadian officials have not responded to inquiries about the proposal. The U.S. Supreme Court in February overturned earlier tariffs that Trump had imposed on Canada.
Relations between the two countries have been strained since the 2024 election, with Trump previously suggesting the United States might annex Canada and referring to Canadian leaders with informal titles. Canadian consumer groups have promoted a "Buy Canadian" campaign, and some provinces have restricted sales of American spirits, leading to a decline in U.S. exports of certain alcoholic beverages.