Air pollution in India's capital, New Delhi, has become so severe that some residents are struggling to commute to work.

Inside Delhi’s first ever clinic dedicated to pollution-related illnesses, Deepak Rajak struggles to catch his breath.

Parts of South Asia are filled with toxic smog, hurting not only residents' health, but the economies of India and Pakistan.

Residents in India's northern states woke up to another day of poor air quality on Tuesday, as a layer of dense fog shrouded ...