Energy Star is efficiency seal of approval

Last time, I suggested buying Energy Star electronics to cut your energy bills. What is Energy Star and why is their work relevant?

Energy Star is a voluntary program started by the U.S. Environmental Protection Agency in 1992 to promote energy efficiency and sustainability. Energy Star encourages manufacturers and building designers to submit their products for evaluation and (hopefully) certification that they are more energy efficient than competing products. Energy Star thus makes it easier for energy users to identify, products, buildings and industrial systems that are the most energy ef...