[I] recently saw ads for the driven exhaust fan equipment that shoots exhaust gases into the air as they dilute by sucking in several parts of ambient air and delivering it all at high velocity so the combined flow will be put into the atmosphere at higher elevation, as if from a tall stack.rnThis is a sham and a hoax and should not be participated in by professionals - this is going back 30 or 50 years when it was agreed and accepted that the solution to pollution is dilution.
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