Buildings Consume half of all energy used in the US...

As we move further into environmental difficulties and water and energy shortages these numbers begin to jump out on their own.  HALF.  Our buildings need to start consuming less, plain and simple. Investing in green technology for our buildings is a great way to offset our footprint, but we also need to make sure these systems are properly tuned and maximizing their full capabilities.  Here two great articles i found about how older systems can perform better because they are tuned better, and why reducing energy consumption is important.

Why Does a Building From 1971 Function Better Than a Brand-New LEED Building? : Greentech Media
BSI-012: Why Energy Matters