5、 田纳西河流域管理局是美国最大的公共电力公司。本月,其董事会投票表决,关闭位于阿拉巴马州和肯塔基州的八家燃煤电 厂,部分电厂转成天然气电厂。2010年起,150多家燃煤电厂有的已经关闭,有的即将关闭。

参参考考答答案案：： This month, the board of directors of the Tennessee Valley Authority, the country’s largest public power utility, voted to shut eight coal- powered plants in Alabama and Kentucky and partly replace them with gas-fired power. Since 2010,more than150 coal plants have been closed or scheduled for retirement.