The Green College

I suppose that this is a bit pointless given the numbers of PCs left on on a permanent basis or shut down with the monitor still on...

LocalCooling is a 100% Free power management tool from Uniblue Labs that allows users to optimize their energy savings in minutes and as a result reduce Greenhouse Gas emissions.
Download the 100% Free LocalCooling Application and it automatically optimizes your PC's power consumption by using a more effective power save mode. You will be able to see your savings in real-time translated to more evironmental terms such as how many trees and gallons of oil you have saved. And remember fiscally-minded chums in Finance, every tree & gallon of oil saves your masters £££.

http://www.localcooling.com/

Source: BootCamp