Energy conservation refers to reducing or going without an energy service to help save energy, according to the Lawrence Berkeley National Laboratory. This includes actions such as turning off the lights or shutting down a computer once a user is finished for the day. Energy conservation can help reduce greenhouse gases, which are a major contributor to global warming.
Energy conservation is sometimes confused with energy efficiency, but being energy efficient means using less energy for a constant or regular service. An example of energy efficiency is when homeowners replace single-pane windows in their homes with energy-efficient windows. This helps prevent warm air from escaping in the winter months and cool air from leaking out during the summer.