According to the US Environmental Protection Agency, energy efficiency is the use of less energy to perform the same function. Efficiency equipment, machinery when using less electricity, water, or gas to do the same thing.
In many countries around the world, conservation and efficient use of energy is a top priority. The main goal is to really save energy generated and used. Sometimes we call this unused energy "negawatt" (negaoat), which means that the number of watts of energy is never generated because it is not needed. Not using energy from the start is the cleanest and least expensive option. Energy companies therefore prioritize energy saving techniques and ways to conserve energy over recycled energy.

How can I get energy efficiency?
Technical innovation is important to improve energy efficiency. Many products are now designed to save electricity
Techniques for improving energy efficiency at the enterprise level are constantly expanding, from installing street LEDs and lighting the area to installing renewable energy equipment. The benefits are real, and the cost need not be a barrier.
 

Benefits of Energy efficiency in life
Saving energy input
One of the first roles of energy efficiency is to save energy. Specifically, with various energy efficiency measures, the amount of energy consumed will be significantly reduced, thereby saving input energy and reducing consumption costs.
Many energy efficiency strategies have shown that we can save 70 - 90% of energy and costs for lighting, fans, pump systems, 50% for electric motors and 60% for fields of heating, cooling, office equipment.
Reduce emissions, good for the environment
Saving energy input means reducing emissions generated by energy consumption, helping to improve environmental quality, reducing pollution and good for the health of the people.
Expand economic development
Society is developing day by day, and to serve such development needs requires a large source of input energy. The application of energy efficiency measures saves up to 50% of energy, helping to expand and develop the economy more smoothly.
Increase operational efficiency
Energy efficiency often focuses on researching and using advanced technologies to improve production lines, which indirectly helps to increase operational efficiency and thereby increase profits for companies and businesses.
Improve the quality of life
The economy is expanding, costs are falling, performance is improving and the environment is improving, all of these factors are necessary and sufficient conditions for the quality of life to be improved.
 

Some methods of using energy effectively:
Measure energy efficiency
Measuring energy efficiency is one of the first measures mentioned in energy efficiency measures. The measurement of energy efficiency helps us to understand information about the level of use, consumption as well as the energy consumption in the wrong place, so that there are appropriate measures to cut down savings.
Manufacture of energy-saving products
Energy-efficient products operate on a mechanism that minimizes unnecessary energy consumption thanks to advanced technologies. This helps the process of using fuel become more efficient, reducing the amount of energy consumed.
The advantage of this measure is that the products are fully integrated with saving technology, making the application process easier and easier. Energy-saving products of this type also have costs that are not too different from other products of the same type, so they can completely be applied on a large scale, bringing many positive effects.
Improve production line
A measure usually taken at factories, workshops, improving production lines will cause business owners to lose an expense but offset increased operational efficiency, reduced fuel consumption, and reduced costs. Emissions fees are also improved.
Develop more efficient sources of energy
One of the most important measures of efficient energy use is the development of more efficient energy sources. The purpose of using energy resources effectively is to reduce the need to use energy during development, improve the environment and improve the quality of life, so the development of efficient energy sources is extremely important.
The most effective sources of energy are renewable energy with high efficiency such as solar energy, wind energy, biomass energy, ...