世界无烟日手抄报:拒绝二手烟

　　Every year hundreds of thousands of people around the world die from diseases caused by smoking.

　　One in two lifetime smokers will die from their habit. Half of these deaths will occur in middle age.

　　Tobacco smoke also contributes to a number of cancers.

　　The mixture of nicotine and carbon monoxide in each cigarette you smoke temporarily increases your heart rate and blood pressure, straining your heart and blood vessels.

　　This can cause heart attacks and stroke. It slows your blood flow, cutting off oxygen to your feet and hands. Some smokers end up having their limbs

　　amputated.

　　Tar coats your lungs like soot in a chimney and causes cancer. A 20-a-day smoker breathes in up to a full cup (210 g) of tar in a year.

　　Changing to low-tar cigarettes does not help because smokers usually take deeper puffs and hold the smoke in for longer, dragging the tar deeper into their lungs.

　　Carbon monoxide robs your muscles, brain and body tissue of oxygen, making your whole body and especially your heart work harder. Over time, your airways swell up and let less air into your lungs.