The 'ranking' of airlines was made by the European Federation of Transport and Environment (T&E, in its original acronym), which brings together non-governmental organisations in the area of ​​environment and transport, with the aim of promoting more sustainable transport.

According to the research, of the 77 airlines around the world, the majority, 87%, are failing in the transition, as only 10 are adopting credible alternatives to conventional 'jet fuel'.

The other 67 are either purchasing sustainable aviation fuels, but in insufficient quantities, or purchasing the wrong type of fuels, or are not even considering using sustainable fuels.

TAP appears on the list of the worst classified, a list that between 41st and last position has zero points in all options analyed for each company.

The environmental association Zero, which is part of T&E and which publishes the analysis, states that only one known test flight with sustainable fuels is known about TAP's emissions reduction in 2022, "there are no known objectives for the use of sustainable fuels for aviation or e-SAF (synthetic fuel) by 2030 or investments or agreements related to sustainable aviation fuels.”

Zero adds: "Airlines, including TAP, are not only doing too little about adopting sustainable aviation fuels; many of them are doing nothing at all, raising serious questions about the steps that need to be taken to mitigate their climate impact".

According to the 'ranking', the three best-ranked airlines are Air France-KLM, United Airlines and Norwegian, for their use (use or investment) of sustainable fuels (SAF- Sustainable Aviation Fuel).

In the list, airlines received points for setting goals for incorporating e-SAF and sustainable aviation fuels (either actual purchases or commitments made).

The document also denounces the lack of investment by fossil jet fuel producers in SAF (less than 03% of annual aviation fuel production until 2030), and, "even worse" the plans that exist are for bioSAF ( and not for e-SAF, which is a synthetic fuel produced from renewable electricity, green hydrogen and carbon dioxide captured directly from the air).

Worldwide, the adoption of sustainable fuels is very low. According to the study, for the 77 airlines evaluated the projected volumes of sustainable aviation fuels will lead to a reduction of just 0.9% in emissions in 2030.