How Canada's wildfires and air quality warnings are connected to climate change

Wildfires burning in Canada have prompted hazardous air pollution conditions in the U.S. this week, as smoke moves South and lingers over much of the Northeast.

While wildfires in California and other western states have prompted air quality warnings in the past, seeing them on the other side of the country has prompted questions about how much of a role climate change is playing in the event.

Here's a breakdown of what we know about the connection between the wildfires in Canada and air quality.