Trump doubles down on threat to build ‘North America Air Filter Barrier’ between the US and Canada to block wildfire smoke
- Trump repeats threat to build a US-Canada "air filter barrier" against wildfire smoke.
- Proposal tied to ongoing US-Canada tariff tensions.
- Details on cost, feasibility or timeline remain unclear.
Donald Trump has reiterated a threat to construct what he calls a "North America Air Filter Barrier" along the US-Canada border, aimed at stopping wildfire smoke from drifting south into American states. The proposal, floated amid ongoing tariff tensions between Washington and Ottawa, appears to be part of…