Implementing a border levy to price carbon-intensive imports and protect European industries will be “extremely complicated,” warned Jonathan Pershing, a member of the US climate envoy’s team. “I do note that it’s extremely complicated to think about the structure of a border tax,” Pershing told participants at a EURACTIV debate last Friday (7 May). “I don’t disagree in principle that it has value, but I think that it’s got enormous complexity,” he warned. The carbon border adjustment mechanism, due to be revealed in July, aims to put a price on imports from countries where it is cheaper to pollute, as...