Energy efficiency is all the ways that can be used to save energy consumption . Energy efficiency will make the needs of the energy will decrease . Examples of energy efficiency is to use energy-efficient electrical appliances . The number of the world's human population is very much . And all require energy . Some energy sources are included in the amount of energy that does not have a limited or called non - renewable energy . For energy type of non - renewable energy will someday run out . Nature takes very long to provide the energy for humans . Examples of non - renewable energy is petroleum , natural gas , coal , and others . With a number of requirements for the energy very much , while the energy -making requires a very long time , thousands of years , the human need to improve efficiency for the use of non - renewable energy . Many men have been concerned with this,
Saving energy we must do, because we know that the energy we use today, such as petroleum is a limited energy. In a sense the ability of the earth to provide energy is very limited. Therefore there must be a balance between supply and consumption. How can we save energy? In daily life many things we can do to conserve energy, including a save on electricity usage. We must save electricity, is one thing we can do to save energy. how do we save on electricity usage? This can be done with the use of electricity-saving equipment, such as using lcd monitor as lcd monitor has a smaller power consumption compared to the tube.