Comment by TaupeRanger

It isn't. Greenhouse emissions have remained roughly stagnant for over 30 years, while lung cancer deaths have dropped by 50-60 percent. Of course that's largely due to a decrease in smoking, but without any concomitant increase in mortality from "bad air", I don't see how anyone could think it's a "big deal".

Sources: https://www.epa.gov/climate-indicators/climate-change-indica... https://www.lung.org/research/trends-in-lung-disease/lung-ca...