Worst city for light pollution

According to the Center for Biological Diversity (Tucson, Arizona) in 2018, the worst city in the world for light pollution is Saint Petersburg, Russia, where artificial lighting is 8.1 times brighter than the global urban average.

1. Saint Petersburg, Russia, 8.1 times brighter 2. Mecca, Saudi Arabia, 7.4 times brighter 3. Chelyabinsk, Russia, 7.1 times brighter 4. Kuwait City, Kuwait, 7.0 times brighter 5. Calgary, Canada, 6.6 times brighter 6. Edmonton, Canada, 6.5 times brighter 7. Kazan, Russia, 6.1 times brighter 8. Medina, Saudi Arabia, 6.0 times brighter 9. Helsinki, Finland, 5.9 times brighter 10. Tangier, Morocco, 5.3 times brighter