92% of the world’s population lives in areas where air pollution exceeds safety limits,  according to the World Health Organization (...

92% of the world’s population lives in areas where air pollution exceeds safety limits,  according to the World Health Organization (WHO), which has released new research showing where the worst – and least – affected places are. These maps highlight the magnitude of the Air Pollution problem: Swathes of the world are coloured yellow, orange, red and purple, meaning air quality breaches WHO limits.   Credit - WHO