The greening of data centers most likely will not come due to pressure from government or environmentalists or even customers, but because it makes good business sense. Sustainable and scalable data center infrastructure can pay itself in less time due to the overall foot print and the inherent higher energy use. Conversely, profits will deteriorate if overhead cost cannot be contained. And where much energy is wasted on environmental systems rather than on profitable computing, the value of providing high performance infrastructure grows even greater.