Pollution from power plants harms public health, contributing to heart attacks, respiratory conditions, asthma attacks, and premature death. Energy efficiency can benefit health by reducing power plant pollution. This report estimates the health and environmental benefits that would come from a nationwide 15% reduction in annual electric consumption. We present results nationally, for states, and for the 50 largest US cities. We go on to describe some of the ways these results might be achieved and how efficiency programs and policies can be designed to maximize public health benefits.