Not only have experts reconfirmed that smoking really does cause cancer, using a collection of data from many smoking studies, they’ve found it is even more cancerous than they thought. They also claim to finally have definitive proof that secondhand smoke causes cancer. I know that smokers already know they ought to quit, and I’m sure those irritating “truth” ads just make them want to smoke more out of spite, but if we’re taking a public health approach to medicine, support of quiting smoking is way up there as a positive, even in an analysis of overall cost per person.