Half of workers in New Delhi, India, have been ordered to work from home, in a bid to tackle the city's horrific air pollution problem. Thick, toxic smog has engulfed the city since the start of the week, with air pollution reaching 50 times higher than the World Health Organization's recommended safe limit. Schools were already shut down, and all construction was suspended in the world's second-largest city, which has a population of more than 30million. The deadly haze covered monuments and