how does smoking tobacco cause lung cancer The harmful chemicals in directly damage cells, causing DNA mutations that increase risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking Cigarette smoking is the leading

Tobacco is consumed for the effects of its main active ingredient: nicotine

Braconids, and their sister family, the Ichneumon wasps, are the largest families in the order Hymenoptera (Ants, bees, wasps, and saw flies), and yet many of the species are difficult or almost impossible to tell apart without a microscope

Quality of Life Research, 30 (8), 23112327

Since then, for me, Roy writes, all personal achievement comes with a sense of foreboding

The Food and Drug Administration on Tuesday announced its first authorization of fruit-flavored electronic cigarettes intended for adult smokers, a major policy shift that comes after months of appeals to President Trump from the vaping industry