Our quality of life and the proper functioning of our economy depend on a reliable supply of energy at an affordable price. But energy production and consumption, especially our dependence on fossil fuels, are putting pressure on the environment and causing climate change. Energy efficiency means using less energy for the same output or producing more with the same energy input and minimising energy waste. Reducing energy consumption and energy waste throughout the energy system – from production to final consumption – in all economic sectors is one of the EU's strategic objectives.