I think the only effective solution will be for cities to start banning gas powered leaf blowers. I'd definitely vote for that.
Not excessive in terms of monetary cost for both private individuals and businesses, but does actually solve the problem, and much more disruptive in terms of hassle caused.
Downside is logistics on the police end: they actually do need to take those things with them, which is a bit of a hassle, and then do something with them (e.g. send it to a recycling company or whatnot).
That is not how private property works...
> Further regulations would limit the use of [gas] equipment during the summer ozone season. Starting in 2025, public entities, like schools and cities, would be banned from running equipment from June through August. Commercial landscaping businesses would face the same restrictions in 2026.
I'd vote to apply that to residences as well, but you have to start somewhere.
[1] https://www.cpr.org/2023/07/07/denver-gas-lawn-equipment-ban...