One of the most elusive pieces of green energy projects in the US isn't raw materials, labor, or even money.

在美国，绿色能源项目最难以捉摸的部分之一不是原材料、劳动力，甚至不是资金。

Covering a skyscraper with solar panels has never been done before, and the CIS tower was chosen as one of the " 10 best green energy projects" .

用太阳能电池板覆盖摩天大楼的工程从未有过，CIS 大楼被选为“十大最佳绿色能源项目”之一。

Park said green energy projects, like those at Seoul’s City Hall should be encouraged, but those alone could not satisfy all of the country’s needs.

朴说，应该鼓励绿色能源项目， 例如首尔市政厅的项目， 但光靠这些项目无法满足国家的一切需要。