That would be a real precedent.

Every education system keeps deep silence or at most mentions reluctantly about the various ecological disasters caused by humans in the course of history.

On one side the child is taught that human activity (e.g. economy) is "good" and the child sees that it is good by getting to know the plenty of wonderful civilization advances. How do you effectively explain the same child that the same human activity can actually be bad? Can being fed and warm be bad?

Well there are those ecological courses at school but they look more like the rituals we played in the distant past to mercify gods - hug a tree, show some concern about the environment and then go on the way you did before.

I think teaching kids that every choice involves trade-offs from the start would teach them to ask better questions instead of accepting rote answers about life.  
I have to defend the honor of my middle school Environmental Studies teacher (this is back in the late 70s). I can still very vividly recall the class where he went over the pond and the lilypad, and the connection to human population growth. Can't remember his name or anything else we studied in that class, but I remember that part. I think he even told us it was something we were going to have to deal with in our lifetimes. So at least some teachers have been doing their job, and I personally have no excuse of not having been warned of the potential hazards of exponential growth in a finite system.