Energy-efficient buildings are designed to use less energy while providing the same level of comfort and functionality. They often incorporate features such as better insulation, energy-efficient windows, and advanced heating and cooling systems. These buildings aim to reduce energy consumption, which can lead to lower utility bills and a smaller carbon footprint. In addition to saving energy, energy-efficient buildings may also utilize renewable energy sources, such as solar panels or wind turbines. By optimizing energy use and integrating sustainable practices, these structures contribute to environmental conservation and promote a healthier living environment for occupants.