According to the World Health Organisation, about 88 percent of premature deaths in low- and middle-income countries in Asia can be attributed to air pollution. The number of road vehicles in Beijing increased from 1.5 million in 2000 to more than 5 million in 2014 and the number in Delhi, India, is expected to increase from 4.7 million in 2010 to 25.6 million by 2030.