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by deaux 56 days ago
> There isn't really an alternative for jet fuel, is there? Synfuel still has pollution problem and represents like 0.1% of total jet fuel used.

There isn't an alternative for water, electricity and food. Easy to find places where the former two are taxed, the latter is taxed effectively everywhere.
1 comments
dzhiurgis 55 days ago
All of these have alternative sources. Jet fuel has not.
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defrost 55 days ago
Jet fuel has alternatives, as noted above SAF / Synfuel which is increasingly being blended into fossil fuel sourced trad "jet fuel" / kerosene (with a twist).

> Synfuel still has pollution problem and represents like 0.1% of total jet fuel used.

is a fairly lightweight critique of a product development path scarcely five years in:

  Sustainable aviation fuel (SAF) is an alternative fuel made from non-petroleum feedstocks that reduces air pollution from air transportation. SAF can be blended at different levels with limits between 10% and 50%, depending on the feedstock and how the fuel is produced. According to the International Civil Aviation Organization (ICAO), over 360,000 commercial flights have used SAF at 46 different airports largely concentrated in the United States and Europe.

  Worldwide, aviation accounts for 2% of all carbon dioxide (CO2) and 12% of all CO2 from transportation. ICAO's Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) caps net CO2 from aviation at 2020 levels through 2035. The international aviation industry sets goals for SAF usage globally. SAF presents the best near-term opportunity to meet these goals.

  The Sustainable Aviation Fuel Grand Challenge, announced in 2021, brings together multiple federal agencies for the purpose of expanding domestic consumption to 3 billion gallons in 2030 and 35 billion gallons in 2050 while achieving at least a 50% reduction in lifecycle emissions.
~ https://afdc.energy.gov/fuels/sustainable-aviation-fuel

So, have some patience and remember the goal here is to reduce the use of fossil fuel as much as possible .. if Synfuel evolves into something that reduces fossil fuel usage by 50% in the aviation sector, that's a win on the path to ideally eventual elimination altogether.

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