As an example of a green-on-green row, take one in Maine, where environmentalists squabble over plans to expand a wind farm on the wilderness of Kibby Mountain.

以缅因州的一场绿色对绿色的纠纷为例，那里的环境保护论者就计划在基比山的荒地上扩建一座风力农场争论不休。

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With more than 1 million unique student users "Since the launch of LearnSmart in 2009, we've developed a deep understanding of how personalized learning through adaptive technology helps improve student performance, " said Brian Kibby, president of McGraw-Hill Higher Education.

ENGADGET: McGraw-Hill reveals the SmartBook: an 'adaptive' e-book for students