A Delhi chest surgeon warns that the city's air pollution is causing a public health crisis, with 30% of children exhibiting borderline asthmatic conditions. Dr. Harsh Vardhan Puri of Medanta Hospital states that developing lungs are particularly vulnerable, potentially leading to lifelong reduced capacity, lower stamina, and increased risk of respiratory diseases like asthma and COPD. He emphasizes that damage begins early, even before birth, and can lay the foundation for chronic conditions.