kurikai

Having the grass already ruins the biodiversity

The sound is negligible. You wouldn’t even notice it running.

I have got 9 people to buy electric lawn mowers. Electric lawn mowers are amazing.

You can one up him buy getting one of those automated ones that run automatically every couple of days. Get it to run at night and he will be amazed how you keep a perfect lawn without him ever seeing you mow

Sound worse to me for the travellers and airlines