Rapport McKinsey sur l'efficacité des centres de données...
Ce document montre clairement le lien qui peut et qui doit exister entre la réduction des coûts et la réduction des émissions de carbone :
Data centers: How to cut carbon emissions and costs
Article at a glance 
Every large organization depends on vast arrays of servers to run applications, support
electronic communications, and provide productivity tools. But building and operating the data center facilities required consumes ever-larger portions of technology budgets and contributes to greenhouse gas emissions. For some information-intensive businesses, data centers represent half of the corporate carbon footprint.
McKinsey’s work in this area suggests that companies can double the effciency of their data centers through more disciplined management, reducing both costs and greenhouse gas emissions. Specifically, companies need to manage their technology assets more aggressively so existing servers can work at much higher utilization levels.
They also need to make signifcant improvements in forward planning of data center needs in order to get the most from their capital spending
Avec quelques chiffres éloquents : les émissions de carbone liées aux centres de données se rapprochent de celles de pays comme l'Argentine ou les Pays-Bas !
Ce document est téléchargeable (après une inscription gratuite) sur le site de McKinsey : http://www.mckinseyquarterly.com/Data_centers_How_to_cut_carbon_emissions_and_costs_2255
