After quitting smoking efforts can be made to repair the lungs from the damage and scarring of smoking. It is best to avoid second hand smoke and carbon monoxide to prevent further damage. Specific foods have healing effects on the lungs such as pineapple, horseradish, ginger, avocado, and rosemary. Pineapple can behave as a cleanser for lungs, and it increases elasticity and allows more air intake. Physical exercise is very beneficial and will need to start at a low level, then gradually increased daily. Coughing will begin to rid the lungs of mucus and phlegm. Breathing and relaxation exercises are also beneficial in repairing the lungs.