Smog-covered Bangkok 07332772-1.jpg

epa07332772 An officer from the Bangkok Metropolitan Administration uses agricultural drones to spray a water based solution in the air during the operation in an attempt to ease the effects of heavy smog in Bangkok, Thailand, 31 January 2019. The Bangkok Metropolitan Administration Governor Aswin Kwanmuang ordered all 50 districts to be designated pollution-control areas and impose stricter legal measures in an attempt to ease the effects of heavy smog lingers in air pollution worsened in Bangkok city. Fine particulate matter (PM2.5), which can cause serious health issues, remains at unhealthy levels in Thailand's capital and and nearby, according to the Pollution Control Department. EPA/NARONG SANGNAK NARONG SANGNAK

NARONG SANGNAK/EPA