Business Green: Heavy foot traffic at busy subway stations could soon be widely used to power station lighting and other electrical equipment thanks to technology currently being trialled in Tokyo. In a small-scale experiment at Tokyo Station, one of the city’s busiest subway stops, so-called hatsudenyuka floors were installed at station gates, hallways and staircases. The technology features elements capable of generating piezoelectricity, which are embedded in 0.4mm flooring tiles and …