Indian authorities are attempting to bring down air pollution in the capital after record levels in 2016
Like clockwork, the approach of winter in Delhi brings steadily worsening pollution levels in the city. It also heralds elaborate, sometimes hare-brained schemes to fix the problem.
Last year, the Indian capital tried showering the city with water from helicopters; but the aircraft were unable to fly in smog. When authorities used “smog cannons” to blast polluted streets with mist, air quality in those areas declined.