Energy efficiency refers to using less energy to perform the same task or produce the same outcome. This can be achieved through various means, such as using energy-efficient appliances, improving insulation in buildings, or adopting LED lighting. By reducing energy consumption, we can lower utility bills and decrease the demand for energy production. Improving energy efficiency also has environmental benefits. It helps reduce greenhouse gas emissions and lessens the reliance on fossil fuels, contributing to a more sustainable future. Governments and organizations often promote energy efficiency through incentives and programs to encourage individuals and businesses to adopt more efficient practices.