Smoke billows from illegal wildfires on the Indonesian island of Sumatra. The smoke blew east toward southern Malaysia and Singapore, and news media reported that thick clouds of haze had descended on Singapore, pushing pollution to record levels. Singapores primary measure of pollution, the Pollutant Standards Index similar to the Air Quality Index (AQI) used by the U.S. Environmental Protection Agency”rose to 371 on June 20, 2013, the highest level ever recorded -- Picture by Lightroom Photos/NASA