Der Top-Kommentar spricht von Wasserverbrauch. Dein Zitat von Treibhausgasen. Wenn man aber dem Link folgt, gibt es da auch noch eine Aussage zu Wasserverbrauch bzgl Mandel vs Kuh.

Almond milk is good for the climate, but uses about the same amount of water as cow’s milk and contains very little protein. Notably, the amount and impact of water use varies depending on where and how food is grown, and some places are more water scarce than others. Thus, the impact of almond milk’s water footprint may be worse than cow’s milk if comparing almond milk produced in a water-stressed region such as California with cow’s milk produced in less water-stressed regions. That said, California is the top producer of cow’s milk in the United States, so comparing direct water use footprints is still valid in many cases.

Quelle