The U.S. Energy Department is seeking feedback from stakeholders on an $8 billion initiative to establish at least four regional hydrogen hubs.

The U.S. Defense Department has funded operational demonstrations of Silent Arrow’s GD-2000 unmanned cargo glider.

Virgin Group has formed a strategic partnership with chemical recycling company Agilyx to build a plant in the U.S. to convert plastic waste into synthetic crude oil than will then be refined into lower-carbon fuels including sustainable aviation fuel (SAF) for use by Virgin Atlantic.

But ultimate choice has not been made.

Singapore-headquartered H3 Dynamics has tested what it said is the first integrated hydrogen-electric powertrain nacelle, designed to enable distributed propulsion for a range of aircraft sizes.

In a move that will significantly expand the production of sustainable fuels in the U.S., LanzaJet has entered into an agreement to build a 120 million gal.-a-year facility southwest of Chicago.

Hydrogen supplier Air Liquide and Airbus have signed a memorandum of understanding with Korean Air and the operator of Incheon International Airport to study the development of infrastructure required to support the deployment of hydrogen-powered aircraft.

Boeing has begun routine use of sustainable aviation fuel (SAF) in its commercial-aircraft flight operations, with Epic Fuels to supply 2 million gal. of blended fuel for its Washington state and South Carolina operations through 2022.