> According to this logic, anyone who works in the subway should be dying, what, 10 years earlier? Just two more nuances: 1) The article is measuring loss in

> According to this logic, anyone who works in the subway should be dying, what, 10 years earlier? Just two more nuances: 1) The article is measuring loss in "DALYs" = disability-adjusted life years. 10 DALYs lost may not mean dying 10 years earlier, but could also mean suffering from Alzheimer's for 16 years (Alzheimer's has a weight of 0.66 [1]), or any combination thereof (e.g. 10 years of Alzheimer's + dying 3.3 years earlier). 2) The cited number is for the "worst offender" on the NYC metro. The pollution levels on the London underground are less than a 10th of that. [1] https://en.wikipedia.org/wiki/Disability-adjusted_life_year https://en.wikipedia.org/wiki/Disability-adjusted_life_year