Reading AQI Forecasts: How to Plan Your Week Ahead
Stop reacting to bad air days. Learn to read AQI forecasts like a pro and plan your outdoor activities, exercise, and errands around air quality patterns.
Expert articles to help you understand and protect yourself from air pollution
Stop reacting to bad air days. Learn to read AQI forecasts like a pro and plan your outdoor activities, exercise, and errands around air quality patterns.
From free smartphone apps to professional-grade monitors, discover the best tools to track air quality in real-time and make informed decisions about your health.
You spend 90% of your time indoors, but is indoor air cleaner? The answer might surprise you. Understand indoor pollution sources and how to create truly clean air at home.
Not all air pollution is the same. Learn the critical differences between PM2.5, PM10, ozone, and other pollutants—which matters most and when to worry about each.
What decades of breathing polluted air does to your body. New research reveals the cumulative health impacts of chronic air pollution exposure and why every day matters.
Transform one room in your home into a clean air sanctuary. Complete guide to selecting, sealing, and maintaining a safe space during poor air quality events.
Learn everything about N95 masks for air pollution protection: how they work, proper fit testing, N95 vs KN95 vs KF94, when to wear them, and how to maximize protection.
Cut through marketing hype with our comprehensive air purifier guide. Learn what HEPA, MERV, and CADR really mean, how to size a purifier correctly, and which features matter most.
Don't let air pollution derail your fitness. Learn science-based guidelines for exercising safely when air quality is poor, plus indoor alternatives for high pollution days.
Protect your children from air pollution with science-backed strategies. Learn when to keep kids indoors, how to choose safer schools, and create clean air spaces at home.
Wildfire smoke can turn clean air toxic hundreds of miles away. Learn how fires affect air quality, why the smoke travels so far, and how to protect yourself during smoke events.
Discover how London, Paris, and Stockholm transformed from polluted cities to clean air leaders. Learn the policies and innovations that worked—and how other cities can replicate their success.
India faces one of the world's worst air pollution crises. Explore the data, causes, and health impacts of air quality in Delhi, Mumbai, and other major Indian cities.
A decade of transformation: How Beijing and New York tackled air pollution. Discover the policies, challenges, and lessons from two global megacities' clean air journeys.
Compare air quality across the world's major cities. Discover which cities have the cleanest air and which face the most severe pollution challenges in 2026.
A comprehensive guide to understanding Air Quality Index values, how they're calculated, and what they mean for your health.
Discover how fine particulate matter (PM2.5) impacts your respiratory system, cardiovascular health, and overall well-being.
Explore the peer-reviewed research that enables us to compare air pollution exposure to cigarette smoking.
Learn effective strategies to reduce your exposure to air pollution, both indoors and outdoors.
Many people assume indoor air is cleaner than outdoor air. The truth is more complicated—and important for your health.
See what your daily air pollution exposure means in terms everyone understands.
Calculate Your Exposure