For mowing your lawn. Please bring back clean! :) If you're not sure how, here's some excellent advice:
https://www.youtube.com/watch?v=KEd79NmKgI8
And here's another thought: Why not just get rid of your lawn and grow some vegetables instead or some lawn alternatives: https://www.gardenersworld.com/plants/alternative-lawn-mixes/
These options are way lower maintenance and way better for wildlife. Win win. :)