# Video : Obstructive or restrictive lung disease

Lung diseases is a large group of diseases that affect millions worldwide. It is well documented that smoke, dust, gas, and fumes can affect respiratory health, and that tobacco smoking is a major cause of lung diseases. Still, 10-15 % of diagnosed lung diseases can be related to different exposures at the work place. A work-related lung disease can be defined as a lung disease that has been induced or aggravated by a particular exposure in the workplace.