Effects of smoking tobacco compared to inhaling other smoke
(at an epidemiological scale)
WHO on tobacco

more than one billion smokers worldwide...
Tobacco kills nearly 6 million people each year.

WHO on indoor air pollution

Around 3 billion people still cook and heat their homes using solid
fuels in open fires and leaky stoves. About 2.7 billion burn biomass
(wood, animal dung, crop waste) and a further 0.4 billion use coal...
Nearly 2 million people a year die prematurely from illness
attributable to indoor air pollution due to solid fuel use.