Rex pointed me to the NYTimes article on Google’s energy efficiency proposals.
The energy efficiency issue made sense to me when explained it this way:
“But you know how your laptop warms your lap? Or your PC heats up your den? Multiply that a few thousand times over, and you have a problem faced by most datacenters – power draw and heat dissipation. Map that challenge to every business on earth, and you have a global power crisis as the network is built out.” – Jonathan Schwartz, CEO Sun Microsystems