India is suffering unprecedented levels of air pollution, with warnings of dire consequences for people's health. India's top court says the capital is choking every year and blames state government for failing to curb pollution. A car-rationing system has been launched, but the Supreme court considers it a 'gimmick' and wants firm action to address the problem. Pollution is so high that schools have been shut, flights diverted and a public health emergency declared. Some experts say breathing the city's air is as bad as smoking 50 cigarettes a day. And that's not just in the capital. The World Health Organization says 13 other Indian cities are among the world's 15 most polluted. But what's being done to tackle it? Presenter: Darren Jordon Guests Karthik Ganesan, research felllow at the Council on Energy, Environment and Water. Lauri Myllyvirta, lead analyst on Asia at the Centre for Research on Energy and Clean Air. Faizal Parish, Director of the Global Environment Centre.