health of human being

Smoking is dangerous to health.More people are addicted in tobacco and smoking.Although it is not useful but factories and other forms are making the cigarettes and tobacco. Since 1939,numerous scientific studies have been conducted to determine whether smoking is health hazard.The trend of the evidence has been consistent and indicates that there is serious health risk.Cigarettes smoking is associated with a shortened life expectancy. Many scientific studies have shown that smoking is harmful for our health. Smoking makes our life short. Smoking causes the cancer of lungs,throat,bladder and oral cavity. Male cigarette smokers have a higher death rate from heart disease than non smoking male. Female smokers are thought to be less affected because they do not breath in smokes show deeply. Some physicians think that cancer is caused not only by smoking but also by polutiation, nervous stress, pesticides and chemicals in processed food. However, smoking is major causes while smoking smoker takes in mixture of glasses, chemicals, ash, nicotine and other poisons. This components remain on the membranes of lungs and air tube. Most lungs cancer begin at bronchus. Smoking also effects the heart and blood vessels. It makes veins narrow causes pain in hands and feet and sometimes they should be amputate cigarette smoking has greater effect then cigar or pipe smoking. However nicotine consumption is not less in other forms of smoking. Filter and low tobacco marginally reduce the danger. But they do not eliminate the hazard. To reduce the danger of cancer and other disease one should give up smoking.