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If we've got data, let's go with the data. Aviation accounts for about 2.5% of global CO² emissions. https://ourworldindata.org/global-aviation-emissions http

If we've got data, let's go with the data. Aviation accounts for about 2.5% of global CO² emissions. https://ourworldindata.org/global-aviation-emissions https://ourworldindata.org/global-aviation-emissions Rapidly ramping down fossil fuel based air travel will have approximately no effect on climate.

fulafel 2y ago
From your link: "Although CO2 gets most of the attention, it accounts for less than half of this warming. Two-thirds come from non-CO2 forcings." So it's much over 5%. All of transport sector emissions makes up 20%. The other subsectors are decarbonising, but there's no tech solution in sight for air travel in the needed timeframe. And air travel is growing alarmingly quickly (doubled between 2006 and 2019). All the individual slices of the pie we can tackle are pretty small, aviation is one of the bigger ones. We can't keep subdividing and then concluding for each one that it's too small to matter.
- TheSpiceIsLife 2y ago
  Also from my link: In 1990, one passenger-kilometer would emit 357 grams of CO2. By 2019, this had more than halved to 157 grams.
  - fulafel 2y ago
    That's true, but of course this is a much slower rate of improvement (30 years to 2x) than the growth of air travel, and has slowed in recent years[1] since seat density and seatu utilization can't be increased much more without radical approaches like sedating people and stacking them like cargo. [1] https://www.mckinsey.com/industries/aerospace-and-defense/our-insights/future-air-mobility-blog/fuel-efficiency-why-airlines-need-to-switch-to-more-ambitious-measures https://www.mckinsey.com/industries/aerospace-and-defense/ou...
eesmith 2y ago
My single vote will have approximately no effect on the outcome. That doesn't stop me from voting.
stop50 2y ago
Since don't spent a dime on transport & other things don't need to be transported the reduction is a bit higher.
ben_w 2y ago
While the percentage shows that aviation is not a *priority* for climate change, the required reductions in CO2 emissions for the climate to stabilise are around 99.9%, so aviation-induced emissions will have to come down at some point.

fulafel 2y ago

From your link: "Although CO2 gets most of the attention, it accounts for less than half of this warming. Two-thirds come from non-CO2 forcings." So it's much over 5%. All of transport sector emissions makes up 20%. The other subsectors are decarbonising, but there's no tech solution in sight for air travel in the needed timeframe. And air travel is growing alarmingly quickly (doubled between 2006 and 2019). All the individual slices of the pie we can tackle are pretty small, aviation is one of the bigger ones. We can't keep subdividing and then concluding for each one that it's too small to matter.

TheSpiceIsLife 2y ago
Also from my link: In 1990, one passenger-kilometer would emit 357 grams of CO2. By 2019, this had more than halved to 157 grams.
- fulafel 2y ago
  That's true, but of course this is a much slower rate of improvement (30 years to 2x) than the growth of air travel, and has slowed in recent years[1] since seat density and seatu utilization can't be increased much more without radical approaches like sedating people and stacking them like cargo. [1] https://www.mckinsey.com/industries/aerospace-and-defense/our-insights/future-air-mobility-blog/fuel-efficiency-why-airlines-need-to-switch-to-more-ambitious-measures https://www.mckinsey.com/industries/aerospace-and-defense/ou...

eesmith 2y ago

My single vote will have approximately no effect on the outcome. That doesn't stop me from voting.

stop50 2y ago

Since don't spent a dime on transport & other things don't need to be transported the reduction is a bit higher.

ben_w 2y ago

While the percentage shows that aviation is not a *priority* for climate change, the required reductions in CO2 emissions for the climate to stabilise are around 99.9%, so aviation-induced emissions will have to come down at some point.