问题:
[单选,材料题] 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
A . Coal heats up on its Own and catches fire and burns.
B . The underground oxygen will be used up.
C . Poisonous fumes and greenhouse gases wm be accumulated anderground.
D . There will be an increase of abandoned mines.