Officials issue air quality advisories across US and with nearly 900 forest fires –many of them ‘out of control’ – burning to the north

As they did last month, wildfires in Canada are again expected to spread increased air pollution to the US this week, as millions in the country are under air quality advisories.

About 70 million people could be under air quality alerts as wildfire smoke from western Canada spreads to parts of the northern US and as far south as Alabama, CNN reported.

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