I like the question. I want to make a couple of quick points. One is what the scope of CEPA is whether we're talking about environmental tobacco smoke or active smoking.
Certainly, active smoking is the predominant cause of lung cancer, responsible for some 90% of all lung cancers in this country, but among the other causes, and this is my second point, close on the list would be radon in your homes, which is responsible for about 10%. The vast majority of the radon-related lung cancer cases, however, occur in smokers because of the synergism between the two agents. If you got rid of smoking, you'd also solve the radon problem.
This point came up in the “next generation of risk” science project we did, in which you might have a particular statute that focuses on an environmental agent such as radon, while a lifestyle factor such as smoking is outside the scope, but because those two interact, maybe at a cross-agency or cross-statute nexus there might be some public health interventions you could design that would serve multiple purposes. That's what we call the population health approach to risk assessment.