Green Cloud ~ Helsinki's Enviro-Power Meter!

Thanks to WebUrbanist's Steve for spotting Smokin’ Stacks: 10 Ways To Upcycle Industrial Chimneys, including this Finnish smokestack at the Salmisaari, Helsinki power generation substation where the Nuage Vert -- Green Cloud -- folks beam green laser light at night on the emissions cloud thus creating a highly visible power meter...