Delhi, the capital city of India, has the worst air quality ever measured. The super-massive carbon emissions make the daily air as gray as fog. This week we talk with Yukti Singh, a physician born and raised in Delhi, who grew up breathing this air. Not only does she have first hand information about it that's interesting, and enough medical expertise to explain what this does to a human body, but she has a perspective on its role in life that, in many respects, fits the global climate crisis.