50 years measuring the cleanest air (csiro.au)

Australia is marking 50 years of continuous atmospheric monitoring at the Kennaook/Cape Grim baseline air station in northwest Tasmania, which measures greenhouse gases, ozone-depleting substances and many other trace pollutants. The site was selected for its exposure to clean Southern Ocean air, and data collected since 1 April 1976 has supported climate research and international tracking of emission-reduction efforts. The article notes that long-term records show rising CO₂ from human activities alongside declines in pollutants such as CFC-11, consistent with the Montreal Protocol.