Just to put some numbers to how bad 2-strokes are:
> The two-stroke leaf blower was worse still, generating 23 times the CO and nearly 300 times more NMHC than the crew cab pickup. Let's put that in perspective. To equal the hydrocarbon emissions of about a half-hour of yard work with this two-stroke leaf blower, you'd have to drive a [Ford F150] Raptor for 3,887 miles
> The two-stroke leaf blower was worse still, generating 23 times the CO and nearly 300 times more NMHC than the crew cab pickup. Let's put that in perspective. To equal the hydrocarbon emissions of about a half-hour of yard work with this two-stroke leaf blower, you'd have to drive a [Ford F150] Raptor for 3,887 miles
https://www.edmunds.com/car-reviews/features/emissions-test-...