I am aware there is a lot of complexity (obviously) in why people develop lung cancer, or any illness for that matter, but within that assumption was smoking being far worse than it actually is. Reading further, and this may also seem obvious written out in this simple form, the cancer numbers for people in homes using coal burning for cooking food varies hugely depending on the coal. And that the incidence of lung cancers in 'never-smokers' is rising rapidly globally.
