October 21, 2013 - Energy efficiency is a notoriously difficult resource to track. Measuring energy not used in a home, a commercial building or across the economy often requires a range of assumptions and a variety of models -- techniques that are sometimes criticized for being too generous or too complicated.
Depending on the assumptions, we can come to all kinds of conclusions about the effectiveness of efficiency.
One recent study from ACEEE showed that energy efficiency has played a far more important role in delivering economic services than energy production over the last 40 years. read more>>>