In 2020, Stanford's radiative cooling technology reached a California supermarket roof; panels were estimated to save 15% to 20% energy, while a Tempe bus shelter film was reported 30°F cooler

New technology allows surfaces to cool themselves under direct sunlight. This innovation reflects sunlight and radiates heat into outer space. Panels using this cooling method are now powering supermarket refrigeration systems. Bus shelters in Arizona are also experiencing significantly lower temperatures. This passive cooling offers practical relief from rising global heat.