Delhi is inhaling poison as air quality deteriorates by the day. Diwali pollution and farm fires are adding to the air crisis in the national capital. Children are back to school after Diwali in 'severe' air. Who is responsible for poisoning Delhi? Are government measures too little too late? NDTV's Ajilee Ishtwal speaks with health experts and activists to find out more about the health hazards of this toxic air, that is making Delhi a gas chamber.