A comprehensive guide to air quality measurements, pollutants, and their impact on health
Air quality is a critical environmental and health concern that affects millions of people worldwide. This guide explains the key concepts, measurements, and implications of air quality monitoring.
The information provided is based on scientific research and official environmental protection guidelines.
Learn about the major pollutants that affect air quality and their sources.
Microscopic particles that can penetrate deep into the lungs and bloodstream.
Common sources: Vehicle emissions, construction, industrial activities, smoke
A reactive gas formed when pollutants react with sunlight.
Common sources: Vehicle exhaust, industrial emissions, chemical solvents
An odorless, colorless gas that can be harmful when inhaled in large amounts.
Common sources: Vehicle exhaust, indoor heating, industrial processes
A reddish-brown gas with a pungent odor that can irritate airways.
Common sources: Vehicle emissions, power plants, industrial processes
A colorless gas with a sharp odor that can harm the respiratory system.
Common sources: Fossil fuel combustion, industrial activities, volcanic eruptions
A colorless gas with a strong odor that can form harmful particles.
Common sources: Agricultural activities, animal waste, fertilizers
Understanding the methods used to calculate Air Quality Index values
The United States Environmental Protection Agency (EPA) uses a standardized formula to calculate AQI:
AQI = [(IHigh - ILow)/(CHigh - CLow)] × (C - CLow) + ILow
Where:
This calculation is performed for each pollutant, and the highest value becomes the AQI