Wildfires in Canada led to dangerous air quality in parts of the US for the first time. See the affected areas
By Annette Choi and Krystina Shveda, CNN (CNN) — Cities across the US, particularly those in California where wildfires are common, are often exposed to lower air quality due to a mix of urban pollution and weather effects. But even some rural areas of the country known for their pristine air reached dangerous pollution levels
Continue Reading