Global study links 1.5 million deaths every year to air pollution from wildfires
Delhi-NCR chokes under dense smog as AQI peaks to 'severe' level
Lahore smog crisis worsens with 15,000 new cases; NASA captures alarming image of pollution
Delhi faces worst air quality, Baddi and Chandigarh follow in the top five polluted cities
Delhi-NCR AQI nears 'severe' levels in several areas; average remains 362
Prolonged exposure to arsenic in drinking water may up heart disease risk
