Lmao , respirator protection required ! Insecticide ?

Interesting.

"Insecticide ?" Do u see the concrete pieces 1 that holds the grate and the row of them? They act as a underground street gutter running everywhere so if it is insecticide, it is a very small area they are spraying.

Also Japan Kyoto, Tokyo, busses, trains, no talk on cell phone, quiet is a cultural thing and ironically, people are sweeping leaves with no leaf blower\vacuum to be seen- only broom and dust pans. But yet HQ of Echo, Redmax, etc. are from there.

Well what was the vapour emitting from the blower , it was not steam vapour ! If it was smoke then why smoke induction to sewer ? I would think rather a form of insecticide to kill or reduce potential for larvae reproduction !

"then why smoke induction to sewer " don't know and didn't really care- just thought it was cool (small engine and all SS?? to boot)

Oh certainly was Cool , I was just offering scenario for its use and assumed u had further knowledge . I have seen in the past in Japan face mask usage due to respiratiory disease and industrial pollution .Have no idea of similar issues in Taiwan lol.