Travel
2. 4.23:15 → 23:30
When will we finally be able to fly without a guilty conscience? How far have the developments of environmentally friendly fuels and propulsion systems progressed? We ask airlines, engineers and critics.
TV Program
When will we finally be able to fly without a guilty conscience? How far have the developments of environmentally friendly fuels and propulsion systems progressed? We ask airlines, engineers and critics.