I hope this is part of a new positive development. But to me it sounds like one more in a series about biofuel that has generally gone nowhere or hit some lim

I hope this is part of a new positive development. But to me it sounds like one more in a series about biofuel that has generally gone nowhere or hit some limit that is not getting better. I say that because this same story pops up every ~2-3 years, but the important question that never gets conveniently ignored in the articles is, they flew using plant-based fuel at what price? Price is what determines everything for our behavior, including airlines deciding to fly planes all over the place. Reporters (and of course the press release) seem allergic to addressing such questions. If you read a story about biofuels and it has no mention of the price of the fuel, you can bet it's pretty much a meaningless piece of news. There is not a single $ sign in the story. It always turns out the fuel costs like $25 per gallon to produce. The basic concept that you can make fuel from biomass is not challenging. And flying it in a plane's gas tank is not new. Manufacturing it at a competitive price is. What will happen is that this will go nowhere, because neither United Airlines nor any other carrier will pay that per gallon compared to the $6-7 they usually pay. Unless it's continuously subsidized. Or until a technology comes along to make the price much more economical. Past examples: 2008: https://abcnews.go.com/Technology/story?id=4338149&page=1 https://abcnews.go.com/Technology/story?id=4338149&page=1 2010: https://www.scientificamerican.com/gallery/military-green-us-air-force-flies-on-biofuel/ https://www.scientificamerican.com/gallery/military-green-us... 2011: https://www.npr.org/2011/09/26/140702387/air-force-and-navy-turn-to-bio-fuels https://www.npr.org/2011/09/26/140702387/air-force-and-navy-... 2016: https://www.biofuelsdigest.com/bdigest/2016/10/02/american-airlines-hires-ocean-park-to-assist-with-renewable-jet-fuel-evaluation/ https://www.biofuelsdigest.com/bdigest/2016/10/02/american-a... 2018: https://www.theguardian.com/environment/2018/jan/30/qantas-uses-mustard-seeds-in-first-ever-biofuel-flight-between-australia-and-us https://www.theguardian.com/environment/2018/jan/30/qantas-u... Not a peep heard from these practically since. Sorry this is a little negative. But if there is to be any informed / useful understanding of the topic (which I think this place is about), and not just feeling good after reading a story for 30 seconds, this is the key issue, not just the nice headline. Otherwise you go away for a couple years and wonder "hey what happened to that good news about achieving biofuels?" It's like if I told you I demonstrated that we could run your car on biofuels. Great. At $25/gallon? Not so impressive.