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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 o
by 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 agoAlso 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 agoThat'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...