The subjects will be recruited during a medical visit in the Departments of Pneumology and Occupational and Environmental Pathologies.
After information and inclusion of the subject in the study, a collection of clinical data, the state of health and the smoking status of the subject will be carried out by the clinical study technician.
A collection of the exhalation will also be carried out by the clinical study technician.
Several groups of subjects will be formed according to pathologies (COPD versus non-COPD), age and smoking status
