And the industrialized cow agriculture is one of the biggest problems in that.

Pasture-fed cows, such as the French use for top-tier butter, isn't. And that's even before considering that there's a gazillion things more impactful than cows when it comes to climate change.

You'd have to look at Danone, not Croissants... and Danone actually isn't that bad TBH as far as giant milk companies are concerned. Arla, OTOH, is exporting milk powder into the world. The easiest change would be to ban the import of soy, or demand that producers must produce X% of the food on the same farm (it's essentially 100% for organic production already), but then that might cause some serious fallout with South America which'd suddenly sit on mountains of soy.