Wildfire Smoke Particulate Matter PM 2.5 New York City PM2.5 Particles Fine Particulate Matter Smoke Inhalation AQI Levels Dangerous Levels Fine Particle Pollution Health Effects AQI Scale Volatile Organic Compounds PM2.5 Harmful Particles Smoky Air Chronic Conditions Health Risks Sensitive Groups Ozone Levels Vulnerable Populations Protective Measures Particle Pollution Air Purifiers AQI Fine-Particle Pollutants N95 Masks Air Quality Index Canada Wildfires Tropospheric Ozone