Will we ever fly supersonically over land?

Re:Will we ever fly supersonically over land? by wolverine876 on Saturday July 03, 2021 @05:59PM (#27725272)

> While on many routes a car is worse in terms of CO2 emission per trip than a small to mid sized airliner if there are less than 3 people in the car.

Wow. I read that one plane trip can increase your carbon footprint by a greater magnitude than all your typical actions to reduce it.

Does anyone know where to find some data?

EDIT: Here's some data https://www.bbc.com/news/science-environment-49349566

https://theicct.org/blogs/staff/planes-trains-and-automobile...

Also, planes have other problems:

* cars can be powered by carbon-free energy. There's not much current prospect for planes.

* planes also do great harm from non-CO2 emissions: "The climate effect of non-CO2 emissions from aviation is much greater than the equivalent from other modes of transport, as these non-CO2 greenhouse gases formed at higher altitudes persist for longer than at the surface and also have a stronger warming potential"

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Re:Will we ever fly supersonically over land? by sokoloff on Saturday July 03, 2021 @07:54PM (#27726025)

Jet engines are pretty robust to fuel quality within broad ranges. Atmospheric CO2 to a carbon-neutral jet fuel is technically possible now. (I don’t think it competes economically with Jet-A/kerosene/diesel at the moment.)

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