According to the third paragraph,what will happen when the underground heat does not dis—appear?
根据以下资料,回答下面的题目。 According to the first paragraph,one or the warnings given by the scientists is that- ACoal heats up on its Own and catches fire and burns.
- BThe underground oxygen will be used up.
- CPoisonous fumes and greenhouse gases wm be accumulated anderground.
- DThere will be an increase of abandoned mines.