Saw a tech guy on YouTube say never delete till you check trash twice.

Yeah this happened to me too, almost the exact same thing. I asked for a bump from 1500 to 4000 and they said no because my history was too short, and I was pretty annoyed about it for a week. Then maybe a month later my score jumped like 18 points and I could not figure out why at first. What I finally figured out was it had nothing to do with the request at all, it was me paying my card down to almost zero a few days before the statement closed so the balance they reported was tiny. Once I started doing that every month my score kept creeping up on its own. The limit itself does not matter much if the reported balance stays low, that is the part nobody tells you when you are starting out.

All that worry about what your little lawn is putting into the air seems a bit much when you think about how tiny one yard is next to every car and factory out there. I get wanting to cut back on exhaust but your push mower saves maybe a gallon of gas a year while a single flight to Denver burns way more. Do what you want with your Saturdays but the air is not gonna notice either way.