I’m have had a Worx Landroid mowing a part of my back yard for about five years. I like it but it is expensive. I think I paid $700 but today they cost even more. You can spend as much as $2,500 on one. Why, I don’t know. This article has a quote that should be repeated. This is about all small engines.
… according to California’s Air Resources Board, operating a commercial lawn mower for just one hour emits as much pollution as driving a Toyota Camry about 300 miles. For a commercial leaf blower, one hour of operation emits pollution comparable to driving a Camry about 1,100 miles.