I think even ebikes would cause now pollution than this drone - microplastics degrading off the rubber wheels and other components, as well as fine brake dust from pads.

I don't know why you're being downvoted. You have a good point. I hate these vague accusations of "that's environmentally unsound" which get bandied around, without any evidence at all and in the full knowledge that they're as impossible to refute as they would be to prove, just because it's an unfalsifiable way of attacking something you dislike. No one ever calls them out on it either.

I was specifically talking about noise-pollution.

My ear-devices-pro+ record decent data and I submit that data as verifiable evidence in this matter.

> But the switch to electric mopeds has been a blessing

In terms of noise pollution, yes. But it has meant some less spatially aware delivery riders flying silently around corners on pavements which is an annoying problem.

Makes for some good youtube videos though (sorry).