This basically just means you should smoke outside, then change your clothes and wash up to get rid of the residue. I do this already.
There are a couple problems with this study scientifically:
1). These people just adde a ton of nitrus acid to the air artificially, not in a "real life" setting. If you smoke in a place with non-venting gas appliances, it might matter--buy how many of us do that?
2). This study was only done with cigarettes, not cigars or pipes. This in no way proves that Nicotine might be toxic, as any number of the added chemicals in cigarettes could be needed catalysts to the chemical reaction to nitrus acid that these guys " found".
3) Both the levels of cigarette smoke and nitrus acid needed for this reaction are unlikely to coexist in most homes anyway. And as previously stated, smoking outside solves the problem combined with changing clothes and washing up.
4). The fact that they persist in declaring categorically that this is "worse for infants and young children" and that "smoking outside won't help" ( which I already showed to be rediculous) sheds serious doubt not only on the scientific integrity of the study itself, but on the pre-existing beliefs and motives (I.e. Who paid for this study").
5). If enough nitrus acid exists in your home to make this an issue, you have oter problems.