Energy-efficient refers to the use of technology or practices that consume less energy to perform the same task or provide the same service. This can include appliances like LED light bulbs, which use significantly less electricity than traditional incandescent bulbs, or energy-efficient windows that help maintain indoor temperatures, reducing the need for heating and cooling. By adopting energy-efficient solutions, individuals and businesses can lower their energy bills and reduce their environmental impact. This is important for combating climate change, as using less energy often means burning fewer fossil fuels, which contributes to greenhouse gas emissions. Energy efficiency is a key component of sustainable living.