Following a greener path has become much more than an altruistic endeavor. Organizations are focusing on developing green data centers in order to reduce the exorbitant power and cooling costs as well as improve operational efficiency. It is quite apparent that the need to construct and operate green buildings will be more and more important - for shareholder value and for the environment. New and emerging tactics and technologies to develop solutions that address today's critical business needs and environmental requirements will deliver economic benefits in an environmentally sound manner, while addressing power and cooling issues in the data center. Decision support systems, such as Aperture VISTA, can assist data centers in becoming "greener" by allowing data center managers manage the physical infrastructure from a holistic perspective and in an integrated process.