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A Thai student wears a face mask as heavy air pollution continues to affect Bangkok, Thailand, 30 January 2019. Thailand, 30 January 2019. The Thai Education Ministry on 30 January 2019 ordered educational institutes in Bangkok city to close after air pollution worsened. Fine particulate matter (PM2.5), which can cause serious health issues, remains at unhealthy levels in Thailand's capital and nearby, according to the Pollution Control Department. (Photo by Narong Sangnak/EPA/EFE)
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