As a part of a project for a class we were tasked with trying to cut emissions/energy waste of airplanes. Now we've realized that running the apu on the ground at the gate and taxiing is a serious waste of energy and has high emissions. I was wondering if you guys had any other thoughts on inefficiencies on the airplanes and any ideas around backup power for the airplane anytime that is on the ground. This includes taxiing.
Our group was also looking at external batteries that can be attached and detached to the plane but was worried about such batteries existing.
I'm new here, but any information helps!