'About a tenth of the Earth's surface is covered by this treeless region of the Arctic'
the tundra
THE EARTH: About a tenth of the Earths surface is covered by this treeless region of the Arctic
About a tenth of the Earth's surface is covered by this treeless region of the Arctic
About a tenth of the Earth's surface is covered by this treeless region of the Arctic
THE EARTH
the tundra
THE EARTH