The Blair Black Hole in global climate policy
指出全球温室气体减排进展缓慢，若零碳经济中能源密集型产品国际贸易正常化，则减排成本更低。美国退出国际合作阻碍进程，其他国家保持开放有助于美国重返全球体系并推进气候目标。
Abstract Slow progress in reducing greenhouse gas emissions has led to comments that achievement of global climate change mitigation goals is unlikely, because it is too costly and difficult. It would be less costly and difficult if international trade in energy-intensive goods were a normal feature of the zero-carbon economy, as it has been in the fossil carbon economy. This is difficult when the US under President Trump has withdrawn from international cooperation on trade and climate change. Other countries remaining open and cooperative facilitates re-entry of the US into the global system and continued progress on agreed climate goals.