The conference has been held to discuss the of global warming on people’s lives all over t

问题补充：

The conference has been held to discuss the of global warming on people’s lives all over the world.

A. importance

B. effects

C. protection

D. impression

答案：

A. importance

(答案→)B. effects

C. protection

D. impression

解析：名词辨析。A重要性；B影响；C保护；D印象；结合句意可知B正确。句意：会议已经被举行来讨论全球变暖对人类生活的影响