Final answer:
Decreased ACE levels, alpha-1 antitrypsin deficiency, and overexposure to lead are risk factors for COPD.
Step-by-step explanation:
The three risk factors for Chronic obstructive pulmonary disease (COPD) are: decreased angiotensin converting enzyme (ACE) levels, an alpha-1 antitrypsin deficiency, and overexposure to lead. These factors can contribute to the development and worsening of COPD.
Chronic Obstructive Pulmonary Disease (COPD) is a progressive lung disease characterized by persistent respiratory symptoms and airflow limitation. Several risk factors contribute to the development and progression of COPD. The primary risk factor is exposure to noxious particles or gases, typically through cigarette smoking.