Your car has a good engine (mostly because it's regulated). Your lawnmower has the cheapest possible engine that will spin a blade.
The cheap two cycle engine does exhaust and injection in the same cycle. Inevitably a large fraction of the injected fuel is also exhausted. How that tired back to green house gases I'm not totally sure, but it's certainly very bad for your lung health to breathe it!
The cheap two cycle engine does exhaust and injection in the same cycle. Inevitably a large fraction of the injected fuel is also exhausted. How that tired back to green house gases I'm not totally sure, but it's certainly very bad for your lung health to breathe it!