一个部落煤炭公司对联邦煤炭租约的出价创下历史新低,这表明煤炭的经济可行性正在下降。 A tribal coal company bid record low for a federal coal lease, signaling coal's declining U.S. economic viability.

一位部落拥有的煤矿工提交了创纪录的联邦煤炭租赁低价投标,反映了随着可再生能源增长和需求变化,美国煤炭的经济可行性下降。 A tribal-owned coal miner submitted a record-low bid for a federal coal lease, reflecting the declining economic viability of coal in the U.S. as renewable energy grows and demand shifts. 低出价突出了更广泛的工业挑战,包括来自廉价天然气的竞争和更严格的环境规章。 The low bid underscores broader industry challenges, including competition from cheaper natural gas and stricter environmental regulations.