Reading Time: 3 minutes Anna Borisova lives in the suburbs of Bulgarian capital Sofia, where most families heat their households with coal and wood in the winter. She has two very young children– a baby in her arms, and a little boy. “My 4-year old son is suffering from bronchial asthma,” she says. On windless winter days, the tiny … Continue reading Doctors and patient groups join Unmask My City initiative to clean up Sofia’s air