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Students’ Leaf Blower Suppressor To Hit Retail
(hackaday.com)
This is a most excellent place for technology news and articles.
I still say replace them with rakes.
I get what you're saying, but leaf blowers are also commonly used for cleaning up extra grass clippings from the roads, etc.
And sand/dirt after a windstorm, at least in my area. They're really quite useful.