Wildfires burning in Canada continue to bring smoke south into the U.S with air quality alerts in effect across the Midwest and upper Great Lakes.

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China Shuts Down More Cities in Bid to Contain Deadly Virus
Chinese authorities Thursday moved to lock down three cities with a combined population of more than 18 million people in an unprecedented effort to contain the deadly new virus that has sickened hundreds and spread to other parts of the world during the busy Lunar New Year travel period.
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