As we explain this week, one kind of bottleneck deserves special attention: the supply-side problems, such as scarce metals and land constraints, that threaten to slow the green-energy boom.

正如我们本周所解释的，有一种瓶颈值得特别关注，即稀有金属和土地制约等供给侧问题，这类问题有可能造成绿色能源繁荣的减缓。