/tags/antonio-guterres António Guterres en-US Copyright Tue, 10 Aug 2021 23:01:42 GMT /2021-08-13/colorado-and-utahs-worst-in-the-world-air-quality-precedes-grim-climate-report Two Western cities registered the poorest air quality in the world over the last week as smoke from wildfires in northern California turned the skies over the Rocky Mountains into a chalky white abyss. Tue, 10 Aug 2021 23:01:42 GMT /2021-08-13/colorado-and-utahs-worst-in-the-world-air-quality-precedes-grim-climate-report Robyn Vincent