CleanTech Energy News Science US Air Force Approves New Green Aircraft Demonstrator Project November 22, 2023 admin air force (usaf), aircraft, Aviation, Boeing, clean power, clean transport, electrofuels, fuel efficiency, green economy, green hydrogen, nasa, sustainable aviation fuel, US Department of Defense, us department of energy, US Navy, usaCredit to Author: Tina Casey| Date: Sun, 19 Nov 2023 18:11:02 +0000https://cleantechnica.com/feed/