These countries demonstrate how clean energy adoption, strong environmental policies and favourable geographical conditions can keep air pollution impressively low. According to the IQAir World Air Quality Report (2024), they consistently maintain annual average PM2.5 levels at or below the World Health Organization's stringent guideline of 5 µg/m³.
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on Tue, 17 Feb 2026 15:16:06 +0530
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Tags: Rediff News, Good aqi, clean air nations