Maybe those cargo cult guys were onto something
Coconut oil jet fuel matches kerosene's efficiency in engine tests
31–40 of 250 posts
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#32Earlier quoted context omitted.
> it’s led to poor use of land with questionable climate impact. In the short term, yes, because they were unnecessarily using carbon energy to grow the fuel. But if we want to de-fossilise society in the long run, we need solutions for flying and long distance travel. Electric flying seems infeasible at the moment, and people are looking for suitable bio-fuels to make flying carbon neutral. Afaik the maximum planes…
The best solution to flying and long distance travel is to reduce it as much as possible. This means no more travelling for hedonistic (touristic) purposes. I.e. measures like massive taxation (also for private jets of course).
Electrified high speed rail solves this, with flying reserved for transoceanic needs. Private jets should not exist outside of scientific, medical, or other non luxury/personal use cases. Travel and tourism will always be with us, and should be imho. Carbon taxes, laws, whatever is needed to accomplish it.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#33Do coconuts grow particularly efficiently? Edit: The US created biofuel subsidies a few years ago and it’s led to poor use of land with questionable climate impact. It’s effectively become a wealth transfer to support poor rural American communities, which isn’t necessarily a bad thing but there’re probably more effective ways to do that intentionally.
> it’s led to poor use of land with questionable climate impact. In the short term, yes, because they were unnecessarily using carbon energy to grow the fuel. But if we want to de-fossilise society in the long run, we need solutions for flying and long distance travel. Electric flying seems infeasible at the moment, and people are looking for suitable bio-fuels to make flying carbon neutral. Afaik the maximum planes…
I'm not sure that mass air transit has a place in a post-oil society were we try to leave at peace with the planet. Not just for the carbon impact, but also for the diversity of our species and cultures.
Should every Chinese and Indian visit Venice, even though it destroys the city little by little? Should we send things as futile as watermelons by plane?
Of course, the market wills it so some may think that it must happen, yet I feel that the globalisation and massification of everything made the world a less diverse and interesting place overall.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#34Earlier quoted context omitted.
> it’s led to poor use of land with questionable climate impact. In the short term, yes, because they were unnecessarily using carbon energy to grow the fuel. But if we want to de-fossilise society in the long run, we need solutions for flying and long distance travel. Electric flying seems infeasible at the moment, and people are looking for suitable bio-fuels to make flying carbon neutral. Afaik the maximum planes…
The best solution to flying and long distance travel is to reduce it as much as possible. This means no more travelling for hedonistic (touristic) purposes. I.e. measures like massive taxation (also for private jets of course).
So no tourist travel for the poor or middle class, just the elite rich? And no tourist income for the poor and middle class? This is a policy only the top .1% will enjoy.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#35Do coconuts grow particularly efficiently? Edit: The US created biofuel subsidies a few years ago and it’s led to poor use of land with questionable climate impact. It’s effectively become a wealth transfer to support poor rural American communities, which isn’t necessarily a bad thing but there’re probably more effective ways to do that intentionally.
Is it not a bad thing to encourage poor people to continue doing the thing that has apparently made them poor? It's also very not true that farmers are poor in the US (median household income about 30% greater than general population). This mindset is like a century old.
That is both true and not quite true at the same time. The notion of the Yeoman farm family supporting itself off its land is mostly a myth.
Like everything else. it’s been capitalized and farms have consolidated over time. There were lots and lots and lots of farm workers. who are pretty poor and now lack the assets that their grandparents had.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#36Earlier quoted context omitted.
The best solution to flying and long distance travel is to reduce it as much as possible. This means no more travelling for hedonistic (touristic) purposes. I.e. measures like massive taxation (also for private jets of course).
Electrified high speed rail solves this, with flying reserved for transoceanic needs. Private jets should not exist outside of scientific, medical, or other non luxury/personal use cases. Travel and tourism will always be with us, and should be imho. Carbon taxes, laws, whatever is needed to accomplish it.
> should not exist outside of
Externalities can be made to bear a cost.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#37I think this is awesome. Anything we can do to get away from burning fossil fuel is a win in my book. I don’t know about this particular effort, but it seems to me that aviation could really need some big wins in this direction. Last I looked we still run smaller planes on leaded fuel. Crazy.
Replacing fossil fuel with biofuel only works if we starve half the planet and use their food for fuel.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#38Do coconuts grow particularly efficiently? Edit: The US created biofuel subsidies a few years ago and it’s led to poor use of land with questionable climate impact. It’s effectively become a wealth transfer to support poor rural American communities, which isn’t necessarily a bad thing but there’re probably more effective ways to do that intentionally.
"It’s effectively become a wealth transfer to support poor rural American communities"
I'm skeptical that rural community are the primary beneficiaries. Seems more likely that it's benefiting people who own the patents/companies.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#39Earlier quoted context omitted.
Electrified high speed rail solves this, with flying reserved for transoceanic needs. Private jets should not exist outside of scientific, medical, or other non luxury/personal use cases. Travel and tourism will always be with us, and should be imho. Carbon taxes, laws, whatever is needed to accomplish it.
> should not exist outside of Externalities can be made to bear a cost.
Currently, there is no effective way to put carbon back in the ground, and therefore no way to make the externality bear the cost. This is an excuse to justify high emission, low efficiency use cases. It’s capitalism cope meets buying a Catholic indulgence. “I am wealthy and deserve this and so I will pay a token amount that is meaningless to continue to justify this excessive, unnecessary consumption.”
If the use case does not require fossil fuels, certainly, carry on. Same if your biofuel isn’t going to cause the Amazon to be clear cut and can be economically produced at scale. But until then, have to aggressively impair the consumption of fossil fuels, because it’s only going to keep getting hotter, year after year, long after we reach net zero (which is still a decade or two away). Maybe one day we’ll have a mechanism to sequester carbon, and enough low carbon energy to suck all of the CO2 emitted since the industrial revolution started out of the atmosphere for long term, stable storage to mitigate climate change. But not today, and therefore, these are the facts that must drive policy until the facts change.
Climeworks' capture fails to cover its own emissions - https://news.ycombinator.com/item?id=44017317 - May 2025
> Al Gore gave a TED talk in 2023 where he discussed the carbon capture and disposal industry and specifically mentioned Climeworks. He made fun of the company, calling the capture industry nothing more than a cover for oil and gas companies to keep their businesses afloat.
Even if you don’t like Al Gore, the math remains the math.
Re: Coconut oil jet fuel matches kerosene's efficiency in engine tests
#40Do coconuts grow particularly efficiently? Edit: The US created biofuel subsidies a few years ago and it’s led to poor use of land with questionable climate impact. It’s effectively become a wealth transfer to support poor rural American communities, which isn’t necessarily a bad thing but there’re probably more effective ways to do that intentionally.
All subsidies are wealth transfers. That's the whole point- to incentivize something that wouldn't otherwise happen at a scale the government deems to be of benefit or necessary. Biofuels are part of the all-in-one story of renewable energy, especially the transition phase of reducing carbon emissions before we can get to full electrification. The question of whether or not they are effective in doing so- and whether…
A lot of food cost is due to food waste and convenience (refrigerated shipping, out of season crops, etc). There's already a lot food waste due to logistics and consumer preference.