To be honest, 'blah, blah, blah' is one of my favorite lines. But this one is definitely a good one. It is made of moss. A robot is hanging from cables that prints moss images on exterior walls. The moss purifies the air and promotes biodiversity. What a smart and innovative way to make our city greener. I can imagine that if an organization wants to make an advertorial statement, this is probably one of the greenest choices you can have.