(WHTM) -- Pennsylvanians woke up to hazy skies again.

Canadian wildfires sending smoke to the state triggered an air quality alert through Wednesday. The worst of the smoke is in northeastern Pennsylvania and parts of upstate New York.

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PA's Department of Environmental Protection said people with asthma or other breathing conditions should limit time outside. Smokey air can also have an effect on those who aren't high risk.

"It's the smaller particulates that are really bad," said Dr. Neil Leary, director for the Center for Sustainability Education at Dickinson College. "They are responsible for killing an estimated 100,000 to maybe 250,000 people prematurely each year in the United States. So, episodes like this where y

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