We try to call them green, carbon-free, and planet-friendly — but are they?
Well, some things are and some aren't, I suppose. As you pointed out, no scooter is going to be better for the environment than walking. It's easy enough to see through obvious cynical marketing jive. It gets harder when you have to consider the entire production, consumption and disposal cycle of a product. It gets even worse when you realize that social context also matters: what is the net impact of an electric car that's only driven in an area where all the electricity is coal generated? We consumers cannot be expected to know all the answers, but I think knowing the basics plus a bit of critical thinking will usually lead to making the best choices.