The north temperate zone is human history.

A real stage. I'm afraid this is mainly because

The ecological balance of temperate zone is easily destroyed and controlled by human beings.

Neil is right, so far, "ecological balance is easily influenced by human pendulum."

The fragility of cloth is still an eternal feature outside the tropical region.

Signature "

Perhaps this is why human beings originated from

But almost all great civilizations are not in the tropics.

Africa,

Region,

Because the human community there will meet Xu first.

For a long time,

What an insurmountable tropical disease.

Pretty scary.