Beijing on Friday joined a growing clamour of complaint about US plans for a carbon tax on imports from countries without their own emission caps, warning it could set off a global trade war.

• 对于那些本身不限制碳排放的国家，美国计划对它们的对美出口开征碳关税。为此，中国政府上周五加入了音量越来越高的抗议声浪，警告此举可能引发一场全球贸易战。