this post was submitted on 08 Feb 2026
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Shared rides is a step above on the pyramid.
Grim what I can tell it's not really close. At least for "average cars" and "typical commercial airlines".
https://en.wikipedia.org/wiki/Fuel_economy_in_aircraft
Now take into account that CO2 released at altitude is twice as bad as on the ground, since it absorbs all sunlight before part of it gets filtered out by the atmosphere or reflected by clouds.
I hardly think that's relevant. CO2 doesn't stay where it was released.
https://airs.jpl.nasa.gov/resources/107/concentration-of-atmospheric-carbon-dioxide-from-earths-mid-troposphere-2002-to-2013/
We're talking about yearly averages and decades of warming. Days to weeks is very short by comparison.
You're right, I misremembered. It's not the CO2 that has a higher effect when released at altitude than on the ground.
It's Nitrogen Oxides, water vapor and soot.
"In 1999, the IPCC estimated aviation's radiative forcing in 1992 to be 2.7 (2 to 4) times that of CO2 alone − excluding the potential effect of cirrus cloud enhancement.[6] This was updated for 2000, with aviation's radiative forcing estimated at 47.8 mW/m2, 1.9 times the effect of CO2 emissions alone, 25.3 mW/m2.[7]"
https://en.wikipedia.org/wiki/Environmental_impact_of_aviation#Factors