Alcohol is a very bad liquid. It causes holes in your liver. It also ruins your life big time. It could also make you sleepy. It can give you terrible headaches.
Cigarettes contain tobacco, tar, and carbon monoxide.
Those substances are not healthy. Tar is a sticky dark brown substance formed by the particles in tobacco smoke. Tar can make spots in the house on the walls and on the windows. Tar covers and eats up the lungs. Tar also gives less oxygen to breath to smokers.