As of December 2024, Iceland is recognized for having the cleanest air in the world, with a PM2.5 concentration of just 3.4 micrograms per cubic meter.
The place with the cleanest air in the world is generally considered to be "Antarctica" due to its remote location, lack of human activity, and isolation from major sources of pollution. The region has minimal industrial emissions, no permanent residents, and strong winds that disperse any potential contaminants. Apart from Antarctica, some remote areas in countries like New Zealand, particularly around the Southern Alps, and certain regions in Iceland, are also known for exceptionally clean air. These places benefit from low population density, strict environmental regulations, and natural air purification by surrounding forests, oceans, and winds.
The further a place is from human activity, the cleaner it is. By this logic, Antarctica or Greenland could be the cleanest place. There is also a place where CO2 concentrations are measured around the world. Mauna Loa Observatory on the island of Hawaii may be the cleanest place.
https://www.co2.earth/daily-co2#:~:text=423.57%20ppm&text=This%20table%20presents%20the%20latest,a%20day%20with%20few%20exceptions.
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