To be fair, if we cut beef, lamb, and dairy, we get 80% of the GHG benefits of going full vegan. Beef and lamb are really GHG intense.

So you can keep your animal proteins: it'll just be eggs, fish, poultry, and pork.

https://ourworldindata.org/carbon-opportunity-costs-food

For me, it's a hard problem.

For business trips, the choice is between two hours and two days, and unfortunately my body goes haywire if I don't eat some meat at least a couple of days per week (talking about 200g/300g total though. Not kilos of it).

On the other hand, I'd happily take trains as more high speed lines open in my country, and reduce meat consumption to bare minimum my body can tolerate.

For personal transportation, going fully electric won't be possible due to my circumstances, but I'd happily switch to a hybrid which would convert 75% of my in-city travel to electric (which I'm actively planning to do).

I also work on projects which tries to reduce footprint of data centers and computation, so there's that.

It’s hard to convince people not to eat food and take a plane when billionaires do whatever they like at 1000x the carbon footprint, when millions of people drive to work and when base load power is built on fossil fuels. To me eating protein and taking a plane seem benign.