Conversation so far:
why is mediterranean europe called garden of the world
The Mediterranean climatic region is called garden of the world because this name is affiliated with its climate and the plants which correspond with it.
What regions are included in the Mediterranean climatic region
Mediterranean-climate regions are found, roughly speaking, between 31 and 40 degrees latitude north and south of the equator, on the western side of continents.

Question: Is California included
Self-contained rewrite: Is California included in the Mediterranean climate region