In India, #freepublictransport would save more in health costs than would be lost in fares

India spends around 1.28 per cent of the GDP on health while air pollution from burning fossil fuels costs an estimated 5.4 per cent of India's GDP.

...Exposure to pollution from fossil fuels also leads to around 49 crore days of work absence due to illness, the report said.

https://economictimes.indiatimes.com/news/politics-and-nation/the-cost-of-deadly-air-pollution-in-india-rs-3-39-lakh-per-second/a-loss-of-rs-10-7-lakh-crore/slideshow/74112762.cms