That is why plug-in hybrid ground power is becoming part of the conversation. Plug-in hybrid ground power helps fill the gap. For airport operators, plug-in hybrid ground power can also help avoid a false choice. Plug-in hybrid ground power speaks to all of these needs because it combines transition with continuity. For readers looking at how lower-emission GPU design fits into this shift, the APA-100 lower-emission ground power unit article offers a useful example of how mobile ground power is adapting to modern airport expectations.