A woman covers her mouth with a towel as she cycles in her village amid light haze in Muar, in Malaysia's southern state of Johor bordering Singapore, June 20, 2013. Singapore's air quality deteriorated to "hazardous" levels on Thursday as smoke from forest fires in Indonesia obscured skies over the wealthy city-state and parts of Malaysia and disrupted some businesses and travel. At 11 a.m. (0300 GMT) on Thursday, Muar's pollution standards ...
more A woman covers her mouth with a towel as she cycles in her village amid light haze in Muar, in Malaysia's southern state of Johor bordering Singapore, June 20, 2013. Singapore's air quality deteriorated to "hazardous" levels on Thursday as smoke from forest fires in Indonesia obscured skies over the wealthy city-state and parts of Malaysia and disrupted some businesses and travel. At 11 a.m. (0300 GMT) on Thursday, Muar's pollution standards index (PSI) soared to 383, indicating a deterioration of air quality to "hazardous" levels. REUTERS/Bazuki Muhammad (MALAYSIA - Tags: SOCIETY HEALTH ENVIRONMENT)
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