Data Source | GEOS-5 / GMAO / NASA
CO2 display from https://earth.nullschool.net/#current/chem/surface/level/overlay=co2sc/orthographic=-230.54,-18.46,3000/loc=129.435,-21.034
Google Maps
CO display from https://earth.nullschool.net/#current/chem/surface/level/overlay=cosc/orthographic=-236.32,-19.84,3000/loc=129.435,-21.034
SO2 display from https://earth.nullschool.net/#current/chem/surface/level/overlay=so2smass/orthographic=-236.32,-19.84,3000/loc=129.435,-21.034
Is it smelting, cement production or some natural phenomenon - there's nothing apparent on the satellite image from Google: