Thermochromic glass is a special type of glass that changes color in response to temperature changes. When the temperature rises, the glass can become darker or change to a different hue, helping to reduce glare and heat from sunlight. This property makes it useful for energy-efficient buildings and smart windows. The technology behind thermochromic glass involves materials that react to heat, often incorporating liquid crystals or thermochromic dyes. These materials allow the glass to provide better insulation and improve comfort in indoor spaces by regulating the amount of light and heat that enters a room.