Skiing is just one of the activities that Simonsen, Arc's chief executive, and Bjarke Ingels, its lead architect, hope will enhance the latest jewel in Copenhagen's sustainability crown.

that 引导“嵌入式定语从句”，黑体部分为“嵌入成分”（定语从句的主句，是主谓结构：sb. hopes）。为了理解，去掉嵌入成分后：

Skiing is just one of the activities that will enhance the latest jewel in Copenhagen's sustainability crown. （普通的定语从句）

黑体部分，因太多的同位语，干扰了思路。