美国以主权和经济关切为由,对支持联合国新的航运排放规则的国家提出签证和港口禁令警告。 The U.S. warns visa and port bans on nations backing new UN shipping emissions rules, citing sovereignty and economic concerns.

美国已发出警告,称美国可能以对主权和经济影响的关切为由,对支持针对国际航运排放的新的联合国气候提案的国家实行签证限制和港口准入禁令。 The U.S. has issued warnings that it may impose visa restrictions and port access bans on countries that support a new UN climate proposal targeting emissions from international shipping, citing concerns over sovereignty and economic impact. 这一举动突显了全球气候政策执法工作日益紧张的局面。 The move underscores growing tensions over global climate policy enforcement.