Concept for a hybrid-electric plane may reduce aviation's air pollution problem, MIT News

Propeller Makes Comeback in Green Travel, Air Taxis - Bloomberg

Aviation Policy News: Bipartisan infrastructure bill and airports, FAA vs. FCC on 5G, and more - Reason Foundation

Government-backed startup develops hybrid-electric plane of the future: 'The aircraft is designed to support the future

Concept for a hybrid-electric plane may reduce aviation's air pollution problem, MIT News

APH reveals concept for low-emission commercial aircraft

Radical planes take shape

How is Fuel Efficiency Improved in Modern Aircraft?

Aerospace, Free Full-Text

DLR – Future climate-friendly air transport

OPINION: Can an Internal Combustion Engine Be Part of a Sustainable Future in Aviation? - Avionics International

Sustainable Aviation: New Technologies to Improve Environmental Issues of Flying

How new technologies could clean up air travel