1 Geothermal heating & cooling ($4,500 - $6,000) : Considered an eco-friendly heating and cooling option, these systems use energy in the earth to pump heat into a home.
It's all very well to laugh at the military, but when one considers the meaning of life, it is a struggle between alternative viewpoints of life itself. And without the ability to defend one's own viewpoint against other, perhaps more aggresive ideologies, then reasonableness and moderation could quite simply disappear.
The true meaning of life is religious devotion. Many people in the world feel that their true purpose is one of devotion to their religion. Nearly all religions have a supernatural being.