Billions. Everyone would die sooner. You'd expect a 20% drop in life expectancy on average (that's using the massive gains in medicine etc we have already made

Billions. Everyone would die sooner. You'd expect a 20% drop in life expectancy on average (that's using the massive gains in medicine etc we have already made using fossil fuels) The rich in the West, would lose years, the poor would lose decades. People don't cook with wood, which then kills them early, because the cooking is bad. The wood cooking extends their life, but if you could get them to coal power, then it extends their life more. Also the research is BS, a lot of the air pollution deaths are not Fossil Fuels. A lot, perhaps most, are renewables like wood smoke and dust and pollen and manual work that creates airbornes. I'd almost include smoking, since people need to know dust is the same as smoking.