The US just had its worst day for wildfire smoke in its history

When it comes to pollution from wildfire smoke, Wednesday, June 7th, 2023, was by far the worst day on record for the average American. A thick haze of smoke swept in from wildfires in Canada, blanketing much of the Northeast with record-shattering levels of harmful particulate pollution.

The Verge was on the phone with Stanford associate professor Marshall Burke when he got the results of his team’s analysis via Slack. “Jesus,” he says…