In addition to providing a sound, sturdy foundation, concrete walls can also be used within a home. Interior concrete walls provide additional sound barriers and added fire-resistance. If that's not enough, think about the environment. The cement used to make concrete comes mostly from limestone, one of the most abundant minerals on this here planet of ours. And since you only produce what you need, there's less waste.
Concrete walls can also make a home more energy efficient: Although the material does not transfer heat, concrete is able to absorb and retain warmth, reducing the need for a constant heat supply [source: Balogh].