Wildfire Smoke Poses Health Risks: Here’s How to Protect Yourself Smoke from hundreds of wildfires in Canada is posing a health risk for millions of people. WSJ’s Aylin Woodward explains the dangers, what you can do to protect yourself and when we could see relief. Photo: Mary Altaffer/Associated Press

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Persons: WSJ’s Aylin Woodward, Mary Altaffer Organizations: Associated Locations: Canada