Smoking is the single worst thing you can do for your health. Fortunately, it's never too late to get the benefits of quitting. If you've tried to quit before and failed, it's time to make up your mind and try again. Smoking is responsible for one of every five deaths. That includes 29% of all cancer deaths, 87% of all lung cancer deaths, and nearly 20% of all deaths from cardiovascular disease. But long before smoking kills you, it ages you. You can see for yourself that smoking accelerates the drying and wrinkling of the skin. But there are less obvious effects as well. Indeed, smoking takes years away from your life. Nearly half of all chronic smokers die an average of 20 to 25 years before their time. Besides an early death from cancer or heart disease, smoking can cause lung disorders. People who smoke over a pack a day have almost three times the risk of contracting pneumonia  than that of nonsmokers. By lowering levels of estrogen in men and women, smoking speeds bone less. If a woman smokes a pack of cigarettes every day, she will enter menopause with 5 to 10% less bone mass than a nonsmoker. The good news is that no matter what your age is or how long you've smoked, you'll live longer if you quit today. The Coronary Artery Surgery Study examined nearly 2,000 long-term smokers over age 54. Those who quit had significantly lower death rates six years later than those who didn't. Even the oldest ex-smokers had a higher survival rate. Not only will live longer if you quit, you'll feel better, breathe easier, and find that you have more energy. You'll have fewer respiratory infections,headaches, and stomachaches. What's more, you'll save money. Your clothes and breath won't smell unpleasant any longer. And your habit won't annoy--or threaten the health of --the people who live and work with you. All of the following methods are used in the passage EXCEPT   _
giving exmples mentioning famous sayings comparing listing numbers