Energy-saving glass self-adapts to heating and cooling demand

https://www.ntu.edu.sg/news/detail/energy-saving-glass-self-adapts-to-heating-and-cooling-demand

"has no electrical components, works by exploiting the spectrums of light responsible for heating and cooling... During summer, the glass suppresses solar heating (near infrared light), while boosting radiative cooling (long-wave infrared) - a natural phenomenon where heat emits through surfaces towards the cold universe - to cool the room. In the winter, it does the opposite to warm up the room"

Related: New passive device continuously generates electricity during the day or night

https://techxplore.com/news/2023-04-passive-device-generates-electricity-day.html