The other part is a boom in demand for urban housing.

另一部分是城市住房需求的繁荣。

How do we house all of these people, how do we build urban carbon-negative housing in a means that's technologically attainable and broadly affordable -- and do that today?

我们如何为所有这些人提供住所，我们如何以技术上可实现且广泛负担得起的方式建造城市负碳住房——并在今天做到这一点？