The Orange County Grand Jury said it another way in its leaf blower report about the same time.
"Exhaust pollution per leaf blower per hour is the equivalent of the amount of smog from 17 cars driven one hour and is localized in the area of blower usage," the grand jury said.
So when your neighbor's landscaper fires up that blower, imagine sucking on the tailpipes of 17 cars.
Is it really this bad?
Well, the professional landscaper groups say that those reports are outdated and blowers have gotten more efficient, like little Priuses. New standards allegedly have reduced emissions by about 75%.