Robots use invisible light to sanitize Japan's busiest airport

Haneda Airport manages a staggering 1.5 million passengers every day, yet it consistently ranks as the cleanest terminal on Earth. The secret to its success is a nocturnal army of robots that bypass traditional scrubbing for invisible light. These machines bathe ten thousand square meters of gate space in UV-C radiation, a specific wavelength that shatters the molecular bonds of pathogens without leaving a chemical scent or residue.