This resource is an interactive map that shows the Air Quality Index in cities all over the world. It also provides a daily world AQI ranking.

Organization: IQAir

Every year, 7 million people die from air pollution, and billions suffer unnecessarily from the effects of poor air quality. Yet many of people don’t have access to timely air quality information, and often times, air pollution goes unnoticed. IQAir is working to change this. Today, they operate the world’s largest free real-time air quality information platform and engage an ever-growing number of global citizens, organizations, and governments (Source).