Smoking harms nearly every organ in the body and reduces overall health. It causes many diseases such as strokes, cataracts, gum disease, mouth cancer, larynx cancer, esophagus cancer, lung cancer, asthma, heart disease, atherosclerosis, stomach ulcers, kidney cancer, bladder cancer, pancreatic cancer, and low birth weight in babies. Quitting smoking has immediate and long-term health benefits by reducing the risk of these diseases.