Flying might be a fast, fun way to travel, but it's expensive - and it uses a LOT of energy!
Designers at the Center for Process Innovation thought of an interesting way to fix this problem - by removing the windows!
Without windows, the airplane's outer shell would not need to be as thick. That means it could be redesigned using thinner, lighter materials. A lighter plane wouldn't need as much energy and fuel to get off the ground and fly. This would save money and help reduce pollution.
Instead of windows, the inside of the plane would have a sort of digital wallpaper - like having a TV all around you! You could see what's outside, or watch a movie. Click the image below to see more.
What ideas do you have for saving energy while traveling? Submit your ideas on the Design Page.