Yes, bluddy awful this month (especially). The past few years have been a lot cleaner - at least where we are. I can only imagine (and probably wrong, too) that this time around there's been that much more that can burn off, after all the rain last year.
The weeds and crap at our piece of mountain land were up to 5 metres high towards the end of last year - never seen it that high (and thick) before. It took ages to cut it all down (and still ain't finished, either).
We were actually expecting not to see much foul air this year - seeing as a lot of locals have gradually stopped burning so much over the last few years. This year seems to have brought an amazing amount of forest fires in our area, so maybe it's more the uncontrolled fires that are making the air foul, rather than than the locals burning their fields - we haven't actually seen that much of field burning, either.
Whatever - hope it disappears very soon - as it will do after a bit of rain.
Ta