Cityglow Posted on 2017-Aug-09 by adohertyh This is the blue hour; sunset is over. That soft, rosy hue in the far-off sky? The product of 100% anthropogenic light. Advertisements Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Like this:Like Loading...