A prospective study will be conducted in patients with COPD. The investigators will suggest about intervention for preventing in recurrence and aggravation of adult chronic respiratory disease due to exposure to particulate matter.

Study trends and intervention plans related to particulate matter exposure and adult chronic respiratory disease in literature Measurement of particulate matter exposure by individual activities and collection of clinical information Linkage between individual particulate matter exposure and clinical information Investigation about effectiveness of intervention to avoid particulate matter

Inclusion Criteria:

• COPD over 40 years of age
• Patients with pulmonary function tests with Forced expiratory volume at 1 second / forced vital capacity <0.7 and Forced expiratory volume at 1 second1 <80%

Exclusion Criteria:

• Patients under the age of 18
• Elderly people over 80 years old
• People with respiratory symptoms with modified Medical Research Council dyspnea scale 0
• Persons who do not understand the brief description of the particulate matter exposure device
• A person who does not agree to the study