Medical studies on smoking have proven that smoking tobacco is among the leading causes of many diseases such as lung cancer, heart attacks, erectile dysfunction and can also lead to birth defects. Due to inherent health hazards of smoking, many countries instituted high taxes on tobacco products and anti-smoking campaigns are launched every year in an attempt to curtail tobacco smoking.
Every year hundreds of thousands of people around the world die from diseases caused by smoking. Lung cancer from smoking is caused by the tar present in tobacco. Smoking cigarettes causes many changes in your lungs and airways. Some changes occur sudden, last a short time, and then go away. These changes are acute means they are easily treatable and they do not cause higher damage to the body. Colds and pneumonia are acute changes. Other changes which happen very slowly and last for a long time. These are chronic changes which may last for the rest of your life.