[koffiezet]

The problem is though, that many vegetarian options are soy-based, which are pretty much all grown abroad, and have an large environmental impact there. It also requires a LOT more land to grow the same amount of plant-based proteins than meat, which for example results in local farmers in South America burning rain-forest, only to farm 'environmently friendly' soy.

So no, plant-based foods alone is not the holy grail, and also not realistic to force this upon people in the first place. In my opinion, what should happen is that the relatively new plant-based hamburgers which are very very similar to meat would gradually replace the 'mass market' meat for things like fastfood restaurants. But that on it's own isn't enough, we need better production methods for these plants too, so we don't have huge transportation pollution.

And airtravel is not the only big issue, large container-ships are a much bigger problem. Once in international waters, many switch to burning very dirty oil, instead of 'clean' diesel which they only use in local waters to comply with emission norms. Not only that, ships are built to last for decades, and companies won't convert them to full electric without economic incentives.