Diagnosis Chronic Conditions Environmental Health Bronchitis Air Quality Treatment Outdoor Activity Emergency Room Visits Outdoor Activities Inflammation Cognitive Effects Causes Air Pollution Elderly Asthma Symptoms Symptoms Chronic Obstructive Pulmonary Disease Prevention Chronic Sinusitis Inhalers Chronic Bronchitis Heart Disease Pollution Effects Chronic Illness Health Effects of Pollution Poor Air Quality Smoke Exposure COPD
Most of the footprint comes from hydrofluoroalkane propellants in metered‑dose devices, prompting calls for coverage of lower‑emission alternatives.