India's government banned non-essential construction in New Delhi, the world's most polluted capital, and urged residents to avoid burning coal for heating, to combat worsening air quality that has disrupted flights and obscured the Taj Mahal.

View of India’s capital New Delhi as it chokes under toxic smog Air pollution in New Delhi is likely to stay in the 'severe' category on Friday, before improving to 'very poor', or an index score of 300 to 400,