More study linking cancer not just to smoking, but secondhand fumes.

Add colorectal cancer to the list of malignancies caused by smoking, with a new study strengthening the link between the two. And other studies are providing more bad news for people who haven’t managed to quit: Two papers published in the December issue of Epidemiology, Biomarkers & Prevention, a themed issue on tobacco, strengthen the case for the dangers of secondhand smoke for people exposed to fumes as children and as adults. Inhaling those secondhand fumes may raise a woman’s odds for breast cancer or a child’s lifetime risk for lung malignancies, the studies found. All of the findings, while grim, could be useful in the war against smoking, experts say. – From US News & World Report