On June 21, 2013 air pollution levels reached a record breaking high of 401 on the Pollutant Standards Index (51 to 100 is considered moderate quality), increasing existing tensions between Singapore and neighboring Indonesia.
Forest fires on the Indonesian island of Sumatra have caused air-pollution levels to spike to an all-time high in neighboring Singapore.
Via: Ashley Perez/Buzzfeed
Singapore is now calling for "definitive action" from Indonesia as unhealthy air quality is now affecting businesses in the prosperous city-state.
Via: EDGAR SU / Reuters
Via: Sami Abdulluh / Getty Images
