Pollution in India's capital is so bad, spending the day there is like the equivalent of smoking 40 cigarettes. http://www.thejournal.ie/delhi-smog-3097599-Dec2016/ It got so bad at one point the government closed down schools for three days and banned all construction work for five days. Hospitals in the area periodically deal with large-scale outbreaks of respiratory illnesses. This is a Third World country with too many people, and there is a lot of poverty so they can't afford pollution reduction technologies. Keep in mind most of the population can't even afford a car. Around half the families just get by with a little motor scooter. You want to talk about "car pooling", sights like these aren't at all uncommon:
