Radiative cooling is a natural process where heat from the Earth's surface escapes into space, especially on clear nights. The researchers at Stanford University have harnessed this phenomenon by attaching special thermoelectric generators to standard solar panels.
At night, solar panels do not generate electricity because there is no sunlight. While moonlight and artificial lights exist, they are not strong enough to produce usable energy.
From solar-absorbing granite facades that help regulate indoor temperatures to photovoltaic-embedded limestone pathways that generate electricity, these innovations are transforming passive stone surfaces into active energy contributors.