Air travel is very, very, very bad for the environment. So why am I bringing it up on this website? (yeah for rhetorical questions!)
A company is proposing to take old airplane fuselages and convert them into monorails. This just sounds cool! And it is! Energy for the trains comes from solar power, wind power, and regenerative breaking.
This is such a good use for old environmentally unfriendly technology because it takes it and makes it into a sustainable transportation system.
It has yet to be prototyped, but let’s hope that this system is built.