Quote from the Futurism article [0] that links to the submission: “ A prototype jet engine can propel itself without using any fossil fuels, potentially paving the way for carbon-neutral air travel.
The device compresses air and ionizes it with microwaves, generating plasma that thrusts it forward, according to research published Tuesday in the journal AIP Advances. That means planes may someday fly using just electricity and the air around them as fuel.”
[0] https://futurism.com/the-byte/jet-engine-powered-electricity