Dana Reeve: never smoked, died of lung cancer

The Blog of death covers Dana Reeves, best known, despite her considerable achievements, as the wife of Christopher Reeves.

She was only 44 when she died of lung cancer.

It is worth noting, I think, that she never smoked. As fewer people smoke, what lung cancer there is falls ever more often upon non-smokers. I need to get up to date on what the risk factors are now thought to be. (Second-hand smoke? Radium exposure? ?)