Where Most Energy is Wasted

The United States is very wasteful of energy. Overall, we are 42% efficient, meaning that 58% of the energy that we generate is wasted. The major sources are electric power plants, which are 32% efficient and transportation (cars, planes, trains, etc.), which are 25% efficient. Together these two sectors account for 85% of all wasted energy and 70% of all CO₂ emissions. Here is where we should focus our efforts.

Data from Lawrence Livermore Lab 'Estimated U.S. Energy Use' and 'Estimated U.S. Carbon Dioxide Emissions'.