The World Air Quality Report is an annual publication that provides an overview of air quality levels and pollution levels across different regions of the world. It typically includes data on key air pollutants such as particulate matter (PM2.5 and PM10), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon monoxide (CO), and ozone (O3). The report often ranks cities and countries based on their air quality, highlighting areas with the highest levels of pollution. It may also provide analysis on trends in air quality over time and the impact of various factors such as industrialization, urbanization, transportation, and climate change on air pollution levels. Is IAS, IPS, or IFS your dream career? Enroll in ClearIAS Online Programs for UPSC CSE - https://www.clearias.com/programs/ Explore ClearIAS online learning platform - https://www.clearias.com/ Subscribe to ClearIAS YouTube Channel - https://www.youtube.com/clearias?sub_confirmation=1 Join ClearIAS Telegram Channel: https://telegram.me/clearias Download ClearIAS Mobile Apps: (1) ClearIAS Learning App - https://play.google.com/store/apps/details?id=com.clearias (2) ClearIAS Classes App - https://play.google.com/store/apps/details?id=com.cleariasapp