
Earth’s overall air quality is considered good, taking into account air quality readings from nearly 100 major cities spread across regionally diverse areas worldwide. But the air quality in many major cities where the population is dense and that are primarily dependent on burning fossil fuels for their energy needs can reach very unhealthy and even dangerous levels. Of course, generally unpopulated areas like Antarctica and the Arctic have perennially healthy air quality even though air currents from other regions of the planet can carry pollutants there, even in the water! Click on the links below to explore each country’s state of air quality and how they vary based on their various and ranging climates and management of their energy needs.