Top Democrats hoping to run for the US presidency in 2020 are promising to take aggressive steps to rein in an oil and natural gas sector they see as all too eager to work with President Donald Trump to dismantle climate and environmental rules in a bid to expand production. US senators Elizabeth Warren and Bernie Sanders, now polling in second and third place in the early stages of the Democratic primaries, are vowing to block construction of the 830,000 b/d Keystone XL crude pipeline and revoke permits for the already operational 570,000 b/d Dakota Access crude pipeline. Former US vice-president Joe Biden, who is leading the Democratic feld, has remained quiet on those projects but says he will reinstate a drilling ban in Alaska’s Arctic National Wildlife Refuge that Trump lifted in 2017.
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机译：希望在2020年为美国总统竞选的最高民主人士承诺，在有关石油和天然气部门的侵略性措施，他们认为渴望与唐纳德统统的总统拆除气候和环境规则以扩大产量。 。 美国参议员伊丽莎白沃伦和伯尼桑德斯在民主原初级的第二个和第三位投票，正在促使建设830,000b / d Keystone XL原油管道和撤销许可证已经运营的570,000 b / d。 达科他访问原油管道。 前美国副主席乔·拜登领导民主主义界，对这些项目保持了安静，但表示他将在阿拉斯加的北极国家野生动物避难所恢复钻孔禁令，该避难所在2017年举起。
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