Green IT isn't about saving the planet
According to figures from the ACM a 10% reduction in both server power and cooling in all datacentres in the USA would amount to a 0.04% change in total US energy consumption. Wow! So reduce power to save money, or to make yourself feel better, but don't tell me it's about reducing footprint. Especially not if you drive a SUV, live in air-conditioned and/or heated comfort, eat meat, fly, or use anything plastic or electronic. Green IT is marketing, pure and simple. Cynical branding such as KyotoCooling just makes me ill. It is in the same league as people who think they do their bit for a better world for their children by sorting the recyclables in their garbage. Or who bang on about reducing paper usage at work while they wear cotton clothing.
For those who care about these things, see Communications of the ACM, April 2010. Electrical power is about 45% of energy supply in the USA. 1.5% goes to data centres. "much more than 20%", say 25%, is used for cooling. So 0.45 x 0.015 x 0.25 = 0.00169 or 0.2% Same again for running the servers. So a 10% reduction in both server power and cooling amounts to a 0.04% change in total US energy consumption.
See also I'll be going green