World Health Organization
Urban health
Briefs & Fact Sheets
29 Oct 2021
Key facts Over 55% of the world’s population live in urban areas and this is set to rise to 68% by 2050. Almost 40% of urban dwellers have no access to safely managed sanitation services and many lack access to adequate drinking water. An estimated 91% of people in urban areas breathe polluted air. Poorly designed urban transport systems create a range of threats including road traff...