A-A+
The word it (Line 7 Para. 6) probably refer
问题详情
The word "it" (Line 7, Para. 6) probably refers to ________.
A．carbon dioxide
B．nitrogen
C．atmosphere
D．coal请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：关键语句：Thecompaniessaythatrisinglevelsofcarbondioxideintheatmospherewillnotcreateharmfulglobalwarming．Instead，theysayitwillincreaseforestsandotherplants．可见应是二氧化碳．其余选项与本段无关。
