NBAA was told that a number of operators still must register for the EASA environmental registry and that time is running short with a year-end directive.
Most of the aviation industry expects to meet its net zero carbon goals through a mix of new technology and widespread use of sustainable aviation fuels.
Speakers at an EASA conference called for a standard unit price for air navigation fees to stop airlines burning excessive fuel simply to reduce costs.
Leasing group Rose Cay and Irish freight airline ASL both say they will convert twin-turboprop aircraft such as the ATR 72 to hydrogen-electric propulsion.
The heads of six major aviation organizations urged congressional leaders to increase funding for unleaded aviation gasoline research and certification.
Hydrogen propulsion developer and its Dutch airport partners aim to support the first commercial scheduled airline service powered by hydrogen in 2024.