Title:
Scientists identify cleanest air on Earth
Author:
Eleanor Imster
Published:
EarthSky, 5 June 2020
https://earthsky.org/earth/scientist-identify-cleanest-air-on-earth-southern-ocean
From then article:
Weather and climate are complex processes that connect each part of the world to every other region. A team of climate scientists from Colorado State University were curious to see just how far particles produced by human industry and activity reach. To find out, they sailed from Tasmania into the Southern Ocean – which encircles Antarctica below 40 degrees south latitude – and measured the bioaerosol composition – the particles in the atmosphere – at several points.