I've just come from central Thailand in the heart of the farming community and farmers are burning stubble, crop debris, field verges and brush wood areas next to farms or on mountains every night. Sugar cane crops are mostly harvested and refinery's are in maintenance mode so less burning than several months ago but still prevalent.
"They, the Gov" all know how it occurs but these farmers are the ones who vote them into power so cannot say too much to stop this or they will loose a position of influence, 555 I nearly said th "C" word
Red skies at night shephards delight so to speak.