Established companies and startups alike are developing updated propulsion systems with a demonstrably decreased carbon footprint.

The company is the first to meet the FAA's standards for continued development of its low-emission hybrid-electric propulsion system for its next-generation aircraft.

"The FBO at Hong Kong International Airport is now stocking SAF."

The Tennessee-based company's electric propulsion system engine is quieter than a library.

Sustainable aviation fuel production has doubled in recent months, reaching about 30,000 barrels per day as several new projects from leading companies move into production.

The next-generation electric, hybrid and hydrogen aircraft promise to usher in a new era of on-demand air transport and aviation sustainability.