Data centres use vast amounts of electricity to run their computer equipment and also to keep it cool (as most Green ISP Fans will already have been made aware).
Environmental group Greenpeace has estimated that their total global energy use will have reached 2 trillion kw/h by 2020.
Facebook says it has stripped out nonessential parts, paint, logos and stickers – saving, it claims, more than 6 pounds of materials per server in this shared Datacentre.
However, Greenpeace said the company could have gone further to prove its commitment to sustainability.”If Facebook wants to be a truly green company, it needs to reduce its gas emissions,” said Casey Harrell, a climate campaigner.
http://www.bbc.co.uk/news/technology-13010766