Environment Michigan Research & Policy Center
The report ranks cities in Michigan and across the country for the number of days when the air was unhealthy to breathe due to smog pollution last year and this summer, and includes new data showing that the problem is even worse than the public thought.
Smog is one of the most harmful air pollutants – and also one of the most pervasive. It is formed when pollution from cars, power plants, and industrial facilities reacts with other pollutants in the presence of sunlight. Smog is of particular concern in the summer months when warmer temperatures lead to the build-up of higher concentrations of smog pollution.
On days with elevated levels of smog pollution, children, the elderly, and people with respiratory illness suffer the most. Children who grow up in areas with high levels of smog may develop diminished lung capacity, putting them at greater risk of lung disease later in life. Additionally, children exposed to smog in the womb can experience lower birth weight and stunted growth. Even among healthy adults, repeated exposure to smog pollution over time permanently damages lung tissues, decreases the ability to breathe normally, exacerbates chronic diseases like asthma, and can even cause premature death.