Palearctic realm

The Sahara (, ) is a desert spanning North Africa. With an area of , it is the largest hot desert in the world and the third-largest desert overall, smaller only than the deserts of Antarctica and the northern Arctic.

In physical geography, a tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. There are three regions and associated types of tundra: Arctic, Alpine, and Antarctic.

loosely defined region of lands around the Mediterranean Sea

largest of the Earth's eight biogeographic realms

biodiversity hotspot designated by Conservation International which includes several temperate coniferous forests in southwestern China

section of the Palearctic biogeographic realm