Cardinal Walter Kasper, at 77 years old, is wrapping up his tenure as the president of the Pontifical Council for Promoting Christian Unity. On Friday, he reflected on his years in the position ...

Unveiled last year as part of Greenbuild 2015, this gorgeous Unity home is a net-zero prefab that can be assembled in less than three days—but is designed to last for centuries.

A small but growing number of homeowners are choosing to build energy-efficient “panelized” homes that are pre-made in a factory.