I know that regular push mowers are not required to have any sort of emissions controls, so mowing is pretty terrible environmentally. Riding mowers are bigger, and burn more gas, so without any sort of emissions controls I would assume they could be similarly terrible, except worse.
I'm considering getting a riding mower to replace my push mower that bit the bucket, but if it has no emissions controls, I'd second guess my decision. Can anyone chime in on what if any emissions standards riding mowers are held to?
Edit: Per agentp I'm located in the US, specifically Kansas.