photochromic glass

This Glass Can Hold 3D Patterns That Appear and Disappear at the Flick of a Light

Cities of tomorrow: young Poles share vision for smarter, greener living
On the City of Fresno’s laudable waste-handling programs
Serving California’s PG&E, world’s first ultra-long duration hybrid green hydrogen energy storage microgrid moves forward
Truing the Sun
Hidden hunger in Europe: well fed yet undernourished
Where curiosity meets innovation: EU science fair in Belgium dazzles young minds
Spiralling weather and climate impacts documented in WMO report