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epa07639992 (02/25) A general view shows the lights on the Marina Bay Street Circuit for the Singapore Formula One Grand Prix night race in Singapore, 13 September 2018. A 2016 report by the Light Pollution Science and Technology Institute put Singapore as the country with the highest level of light pollution in the world, adding that it was 'not possible to view the Milky Way Galaxy anywhere in the country.' Although fundamental to urban infrastructure, artificial lighting is known to affect the natural circadian rhythm of both humans and wildlife. Ongoing studies and modeling on the broader impact are looking at links to hormone imbalance and diseases, including the occurrence of eye diseases that may be attributed to the mixed sources of lighting used often in street lighting and advertising. EPA/WALLACE WOON ATTENTION: For the full PHOTO ESSAY text please see Advisory Notice epa07639990 *** Local Caption *** 54622688