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.
Life is a characteristic that distinguishes physical entities that do have biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased, or because they never had such functions and are classified as inanimate. Various forms of life exist, such as plants, animals, fungi, protists, archaea, and bacteria. The criteria can at times be ambiguous and may or may not define viruses, viroids, or potential artificial life as liv