If you have bad health habits, such as smoking, drinking too much alcohol, or drinking too much coffee. You will acquire harmful materials such as caffeine and carbon dioxide. Too much carbon dioxide will harm your lungs, making it hard for you to respire. Too much of accumulation of carbon dioxide will result in lung cancer and other respiratory problems. It may also make you a good target for bacteria that will cause you diseases. Drinking too much alcohol will result in high blood pressure. In short, diseases in the circulatory and respiratory system begin to develop from bad habits and accumulation of harmful materials.