electronic cigarettes

My friend Gerry is a smoker. Before he would smoke packs of cigarettes and his wife was fuming mad about it. He still smokes but he is smoking electronic cigarettes that were given to him by his brother. Now, his wife doesn’t mind that he’s still smoking because the cigarette is non-toxic. There’s no firsthand and secondhand smoke that could make them sick. Gerry told them that it’s like smoking the same cigarette but a healthier one.