Keywords: Net-Zero Energy Building Construction Time Lapse Video - May 2012 (7341631834).jpg Net-Zero Energy Building Construction Time Lapse Video - May 2012 https //www flickr com/photos/usnistgov/7341631834/ Net-Zero Energy Building Construction Time Lapse Video - May 2012 2012-06-05 07 53 https //www flickr com/people/63059536 N06 National Institute of Standards and Technology PD-USGov National Institute of Standards and Technology https //flickr com/photos/63059536 N06/7341631834 2016-09-07 01 52 04 United States Government Work Uncategorized 2016 September 8 |