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Everything I have heard about sustainable jet fuel basically points to it being a pipe dream. Bio fuel is not effectively scalable and shows no hope of being so. Where synthetic fuel just increases the energy input per unit of fuel. Neither one addresses the fact that petroleum combust engines at a high altitude have a much greater impact than ones on the ground due to the fact that they inject particulates into the stratosphere. This needs to be placed in the bin as "clean coal"
It seems particulate matter was reducing the impact of increasing CO2. The rate of warming increased as countries around the world cleaned up their air.
https://www.nytimes.com/2023/10/13/opinion/climate-change-excessive-heat-2023.html?unlocked_article_code=MV7Te-BwrX01dDW9YN2x5i4liJ_txffN-7pATpfGL_WC8zVhXtr_JU-6g0GzGtHkwJeXVpDva6LsJulzgYNYhtdocm3bYx2f2XAZ0iWJjBCyuN4rCK-ilrHccUS9yD90VAfe156hv2dsKig2GNAQPOhRtemftQpsWoEH2Do5wbpAOsqFKLoslF2XMTbUm78egNN-0FWwIBPLwOENIXjyug_r5oR-nhVVtAf-8J0wx5YrL8AWd4rg7GXODDSQDCdU8evFlOL5djqlpOaS-AdjgmdK5m_CHhrblDdn1-GI1Rc4TKJhiSOLP-2Vmu-0YGPWZmyWiqnVV09PU3MubJzdXWI09rKmvYW5dvsL
Honestly not an expert on the effects of each part of global warming. I do know that NOx is a big by-product of high temp combustion(jet engines) NOx is a green house gas that is not affected by carbon capture and I believe that the rules about the effects of particulates and gas differ from the troposphere and the stratosphere.
Sorry to burst your bubble, but no matter how bad they are for the planet, planes aren't going anywhere. People will not stop flying, passenger numbers are increasing year by year. Finding climate friendly fuels is the only hope to fix this problem, cause it's not realistically going anywhere
you know, we could just make it more expensive to fly, the invisible hand of the market does not actually solve problems like this.
Same statistical argument could be said for homelessness so I guess let's stop trying to solve that too
Okay so more fuel efficiency is good. But let's not pretend that we can achieve something unachievable like "sustainable" plane fuel.