Is it "green state" or "green state"

Hello ~ ~ Glad to answer your question ~ ~

This is an oasis, not a green country.

The difference between "continent" and "state" lies in:

Continent: refers to the land in the water. Therefore, the green land with aquatic plants in the desert uses "oasis";

Zhou: It was an administrative division in ancient times, and later it was used for place names, such as Guangzhou and Hangzhou.

I hope I can help you ~ ~