Something is happening in Laos.
Carbon Monoxide (L2, 500 hPa, Day | Night),
MODIS (Terra and Aqua) Combined Value-Added Aerosol Optical Depth
https://worldview.earthdata.nasa.gov/?v=74.19185723422902,5.211782584431241,120.21138848422902,29.39928258443124&t=2020-04-01-T07%3A30%3A28Z&l=AIRS_L2_Carbon_Monoxide_500hPa_Volume_Mixing_Ratio_Day(opacity=0.83,min=176.4),Reference_Labels,Reference_Features,Coastlines,VIIRS_SNPP_CorrectedReflectance_TrueColor(hidden),MODIS_Aqua_CorrectedReflectance_TrueColor(hidden),MODIS_Terra_CorrectedReflectance_TrueColor