What are the environmental implications of transitioning people traveling by car/train to small planes? In addition to being louder and dispersing pollutants over a wider area, don't small planes generate significantly more GHG emissions than cars over the same number of miles?
Also, given that planes are not nearly as easy to electrify as cars and trains (energy density is significantly lower in batteries than liquid fuel), it seems unlikely the planet will ever be able to support significant volumes of personal air transit. What are your thoughts on that?