Finding the lowest carbon flight for a specific trip is more complicated than simply choosing the most fuel-efficient carrier.
It's unlikely that the aviation industry can meet its steep carbon targets almost entirely through the use of low-carbon fuels.
Although touted by some as necessary to decarbonize the aviation sector, logistics are still an issue for alternative jet fuels.
Proponents of alternative jet fuels often ignore the reality that many other sectors have laid claims to limited bio-resources as part of their own decarbonization strategies
Despite a nod to supersonic aircraft in the new FAA reauthorization, CO2 and noise standards are still uncertain.
Despite ICAO's reliance on alternative jet fuels to decarbonize the avaiation industry, production does not appear to be keeping up.