For every person whose death is caused by smoking, there are 30 people living with a smoking-related disease. Smoking can damage the whole cardiovascular system in a matter of years. It can cause numerous diseases like lung and oral cancers, stroke, heart and lung diseases, and a number of deadly illnesses. But it’s not only smokers who are at risk of deadly diseases caused by smoking. People who were exposed to cigarette smoke are also at risk. Read on to learn more about lung disease in non-smokers.