It is rare for the U.S. Supreme Court to construe a statutory phrase on multiple occasions. And yet now, for purposes of the federal Clean Water Act (CWA or the Act), it has rendered no less than four interpretations of the...more
On 30 June 2022, the U.S. Supreme Court issued a decision in West Virginia v. Environmental Protection Agency, limiting the U.S. Environmental Protection Agency’s (EPA) power to regulate carbon emissions from power plants...more
In a rebuke to the U.S. Army Corps of Engineers (“Corps”), the United States Supreme Court unanimously held on May 31, 2016, in Corps v. Hawkes that jurisdictional determinations (“JDs”) under the Clean Water Act are...more
In 2007, the Supreme Court told the U.S. Environmental Protection Agency (EPA) it was wrong to conclude that it lacked the authority to regulate greenhouse gases (GHGs) emitted from vehicles, because GHGs are an “air...more