Energy efficiency definition includes all possible methods, techniques, and principles that could lead to more efficient energy use and help decrease global energy demand, such as for instance using compact fluorescent lights instead of traditional incandescent light bulbs or for instance insulating a home.
Energy efficiency is becoming very popular energy topic because world's hunger for energy is constantly growing. By improving global energy efficiency world would need less energy to satisfy global energy demand which would lead to reduced energy costs.
Science is constantly looking for new and improved energy efficient technologies, especially for renewable energy sector. Many renewable energy sources need to significantly improve their energy efficiency in order to become competitive with fossil fuels, and science is yet to come up with the adequate solutions to make renewables more energy efficient.
How much could improved energy efficiency contribute in reducing the global energy use? According to the International Energy Agency, improved energy efficiency in buildings, industrial processes and transportation could reduce the world's energy needs in 2050 by one third. This would of course, also lead to less harmful greenhouse gas emissions which contribute to climate change.
Improved energy efficiency could also improve energy security and energy independence because it could lead to reduced levels of foreign fuel import for many countries of the world, and it could also slow down the depletion rate of domestic energy resources.
Energy efficiency needs to be implemented on multidimensional level to have the best possible effect. This means that we must seek to improve energy efficiency wherever possible, in all sectors (our homes, offices, vehicles and industries).
Energy efficiency is also one of the main prerequisites for building economies, which can in the best possible scenario result in huge economic boom without the enormous energy consumption.
In the last decade or so world has significantly improved energy efficiency though this was largely overshadowed with the tremendous growth of energy consumption in new power economies such as China and India.
Each and every one of us can do something to improve energy efficiency, not only by using compact fluorescent lights instead of traditional incandescent light bulbs but also by buying modern energy-efficient appliances and replacing the old ones. This doesn't only improve energy efficiency but is also one of the most efficient measures to reduce emissions of greenhouse gases that contribute to climate change.