here's a bigger list of diseases and what they do to your respiratory system if you don't keep it clean.  of course there are the other diseases I already mentioned in my last post such as asthma,Chronic Obstructive Pulmonary Disease (COPD causes lung problems makes you take short breaths), pneumonia and the common cold.  And here are some other diseases, Chronic bronchitis - inflammation and permanent scaring of the bronchial tubes, influenza - serious infection by the influenza virus, sinusitis - inflammation of the sinus cavities, Emphysema - damage to air sacs walls causing loss of elasticity, Lung Cancer - malignant tumors that develop in lung tissue, Pleurisy - inflammation of the pleural membrane lining lungs and the chest cavity, Acute Bronchitis-inflammation of the bronchial tubes.  Hope you liked this list of diseases and facts about them.