Andaluza, I agree with Demeter and Sallyrae and Willovia - We use a woodstove, and so far it's been fine. Keep in mind that most pregnant women throughout human history stood over wood (or manure fires) for eight hours a day and most of those humans survived to tell about it. It can be so hard to shut off the brain though! My husband thinks I should stop reading things because I keep finding things that preggos aren't supposed to do. Too bad. I've got itchy-Google fingers.
Boots, I completely agree! I have a little bit of nausea when I don't eat, and weird food aversions, but the idea that women who don't have m/s are significantly less likely to have healthy babies seems to me to be based on a misunderstanding of statistics. More than half of women have some m/s, but that also means that almost half of women DON'T have it, and most of those women go on to have healthy babies. Even if there is a slight increase in miscarriage rates with those who don't have any m/s, it's still probably a pretty small risk factor. One of the studies I found indicated that one of the potential benefits of m/s is that it prevents women from eating dangerous foods during pregnancy, and so can help prevent miscarriage that way. If that's the case (or even part of it) it seems you can do that yourself by choosing healthy and safe foods. There are other links to nutrient restriction and HcG levels and so on, but really I think the increased risk is pretty small. So, don't worry yourself about stuff you have no control over. Also, fwiw, my nausea didn't start until week 7.