You're right, I did not mention radon, nor several other indoor pollutants. There are so many to cover, and in the interest of focus on those that get less attention but which are really important, old standbys like asbestos barely got a mention. And I didn't even bring up smoking—second-hand smoke inside homes is the cause of much disease and death. Congrats on your switch to induction, and good luck with that radon. And in your honor, I'll add a brief mention in the story of radon, so people can at least follow a link to get more info.