These exhibits for educational purposes are very good. And I imagine they also tell you about taxidermy and how it has evolved over the years.
When I read what you mentioned about garbage I remembered how shocked I was the day I saw how long it takes for the different materials we use every day to degrade, and we use them sometimes for only a few minutes, and then throw them away, without thinking about anything else.
Imagine that paper and cardboard take a year to degrade. And people throw their waste into the street, without mercy.
It is terrible. In third world countries it is even more complicated, of course.