10 Cleanest Countries In The World In 2023

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8. Iceland 

Composite Ranking: 8

Air Quality PM2.5 concentration (μg/m³): 3.4 

Waste Management Score: 73.9% 

Wastewater Treatment Score: 15% 

Iceland is among the top countries with the best air quality in 2023 as its air quality PM2.5 concentration reaches 3.4μg/m³. This remarkably low figure, nearing the maximum desirable threshold of 2.5 μg/m³ as per World Health Organization guidelines, shows the nation’s successful environmental policies and its commitment to pristine air. 

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