Air pollution is often worse in the summer. Now, Chicago can monitor it neighborhood by neighborhood

Air pollution is often worse in the summer. Now, Chicago can monitor it neighborhood by neighborhood

This coverage is made possible through a partnership between WBEZ and Grist, a nonprofit environmental media organization.Serap Erdal stopped at a light pole in the middle of Grant Park and pulled out her phone. Behind her, the city’s towering skyscrapers cut into a sunny, blue sky as she zoomed in on her palm-sized map of the city. The researcher barely noticed the hum of buses, cars and cyclists buzzing in front of her. She was working out wha…