【单选题】请阅读Passage 2,完成第小题。 Global warming may or not be the great environmental crisis of the 21st century, but regardless of whether it is or not, we won't do much about it. We will argue over it and may ev...
A.
It may not prove an environmental crisis at all.
B.
It is an issue requiring worldwide commitments.
C.
Serious steps have been taken to avoid or stop it.
D.
Very little will be done to bring it under control.