COPD is a chronic lung disease that causes obstructed airflow from the lungs. It includes chronic bronchitis and emphysema. 16 million Americans have been diagnosed with COPD, with 14 million having chronic bronchitis and 2 million having emphysema. COPD is caused by smoking, secondhand smoke, air pollution, and occupational irritants. It is the fourth leading cause of death in the United States. Symptoms include cough, fatigue, respiratory infections, shortness of breath, and wheezing. Treatment includes inhalers, anti-inflammatory medications, oxygen therapy, and antibiotics. The main treatment objectives are to slow lung function decline, relieve symptoms, improve daily function, and decrease exacerbations to improve