physical features
![图片](/uploads/2/6/4/0/26408555/1392349161.png)
There is rain and fog in the summertime, and water collects in bogs and ponds.
A bog is wet, spongy ground with soil composed mainly of decayed vegetable matter.
Due to the low temperatures, the water evaporates very slowly.
Therefore, the tundra is a very wet place.
The subsoil of the tundra is permanently frozen. This is called permafrost.
A bog is wet, spongy ground with soil composed mainly of decayed vegetable matter.
Due to the low temperatures, the water evaporates very slowly.
Therefore, the tundra is a very wet place.
The subsoil of the tundra is permanently frozen. This is called permafrost.