Passive Solar Design is an architectural approach that utilizes natural sunlight to heat and light buildings without relying on mechanical systems. This design focuses on strategic placement of windows, walls, and floors to capture and store solar energy. Key elements include thermal mass, which absorbs heat during the day and releases it at night, and proper insulation to maintain comfortable indoor temperatures. By maximizing sunlight exposure, Passive Solar Design can reduce energy consumption and lower heating costs. It often incorporates features like overhangs to block excessive summer sun while allowing winter sunlight to enter. This sustainable design method promotes energy efficiency and environmental responsibility.