I am not an expert in this area... but I think environmental literacy is crisscrossed with politics, culture, socialisation, etc... In my definition, learning to consume plant-based beverages can be a good starting point for me, i.e., oat milk.
I am not an expert in the area either, but I can say some language programs (e.g. AP from College Board, US) include critical thinking foci tackling environmental concerns underlining the importance of environmental reflections in modern citizenship.
In general, the following can be mentioned on the subject. I think that these are the dimensions by making general ideas from the studies in the literature.