https://www.renewableenergymagazine.com/hydrogen/protium-secures-funding-to-develop-pathway-for-20210125 https://www.renewableenergymagazine.com/hydrogen/protiu

https://www.renewableenergymagazine.com/hydrogen/protium-secures-funding-to-develop-pathway-for-20210125 https://www.renewableenergymagazine.com/hydrogen/protium-sec... You're probably out of date with your info. Hydrogen based aircraft are happening now.