Top 10 Dirtiest Cities in the World in 2018

3. Cairo, Egypt

Our Index Score: 27.5
Cairo is home to the largest population in Egypt. Averagely, residents of Cairo breathe in air with high levels of particulate matter. WHO states that the particulate matter in Cairo’s air is 11.7 times more dangerous compared to the safe level recommended. The city is also the third noisiest globally after Guangzhou and Delhi. The noise pollution level reaches about 85 decibels on a daily basis. Regarding light pollution, Cairo is the third brightest globally, behind Chicago and Moscow.