Who goes to Bali twice a year? Those aren't representative at all, and why count on people who destroy so much to save our planet? We can ignore them and simply ban such spending. There are so many things I cannot buy (e.g explosive) because we know it's too dangerous for society. Why not prevent the very few from neutralizing all the efforts of millions? A Paris-Bali flight emits more than one year of heating and cooling for a whole family!

>taxing actual emissions so that the food suppliers can adapt

Wait. The only way this could have an impact is you make meat/fish so expensive that people stop buying it. Then, what's the point of adding taxes if you just want people to stop buying it? I bet you simply want to have the freedom to continue to do whatever you want only because you expect to have the means to pay this tax. So you'd only want others to change... and you argue that we cannot expect people to change (e.g become vegetarian versus to having the resources to eat meat/fish). But I understand why you don't believe you can get people to change since you start by excluding yourself from this possibility...

Also, can you explain why I've become vegetarian after I heard facts about the impact of agriculture? Facts that are now more and more spread (see OP's story). The money I save from meat and fish goes to farmers (I've since joined a cropsharing group, which is organic, of much better quality than what can be found in markets, and provide far more support to farmers than just paying more for the same quantity). I'm not pushing farmers to be carbon negative, I'm pulling them because I accepted to change and inviting others to do the same. There's really nothing preventing anyone to be vegetarian (or almost veggie) except ignorance and misconceptions.