These sculptures are cool. I kind of worry about the waste of fruit, but the festival director could be implying they're being handled in such a way that they can be consumed afterward.
https://www.bbc.com/news/av/world-europe-68329887
Citrus is remarkly stable, having lived in an area that grows citrus though, the thought of all that pollen in the air is making my eye's wince.
I bet it smells nice though.