4 Simplest and Most Effective Ways to Save Energy The vast majority of electricity production is achieved by the use of fossil fuels such as coal and oil, which are major sources of pollution. Because of this, conserving electricity also means reducing the amount of air and water pollution that power plants must generate. One of the simplest and most effective ways to save energy is to turn off lights in unoccupied rooms, and to let the sun light the room during the day. Turning off televisions