The Game Government has already acquired detailed information about D07-013, and the fungi there should have been thoroughly studied, which is why the information is so complete.
The data describes Zone 013 as a place rich in rainforests and water bodies. The land is scattered throughout the entire district and accounts for only one-tenth of the total area, mostly comprising rainforests. It's humid and hot, with many areas not suitable for human habitation. Moreover, the rapid evolution of various fungi in such an environment means that some places cannot be entered without a gas mask.
This highlights the advantage of scattered land because the evolution of many fungi or mutated flora and fauna hasn't stopped due to the increase in the number of players. The endless growth has led to many areas previously belonging to humans being invaded, and the water bodies are the best natural barrier.
Books regarding fungi are so numerous that just the indexes alone are thick volumes.
