Coal mining has a deep history in the Appalachian region, where some local economies have heavily relied on coal production. While coal employment in the region has generally been in a long-term de...

中文翻译：

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煤炭活动对阿巴拉契亚地区中小学教育地方收入的影响

煤炭开采在阿巴拉契亚地区有着悠久的历史，那里的一些地方经济严重依赖煤炭生产。虽然该地区的煤炭就业总体上长期处于低位……