Keywords: HCF Environmental Training Centre.jpg Photograph of the Training Centre and office buildings at Heeley City Farm Sheffield showing the turf roof and wind turbine Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Teratornis using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2006-01-30 Original uploader was HCF at http //en wikipedia org en wikipedia PD-AUTHOR; Released into the public domain by the author HCF original upload log page en wikipedia HCF_Environmental_Training_Centre jpg 2006-01-30 12 20 HCF 968×631× 489842 bytes <nowiki>Photograph of the Training Centre and office buildings at Heeley City Farm Sheffield showing the turf roof and wind turbine </nowiki> 2006-01-30 12 17 HCF 968×631× 489842 bytes <nowiki>Photograph of the Training Centre and office buildings at Heeley City Farm Sheffield showing the turf roof and wind turbine </nowiki> Micro-generation wind turbines Sheffield Wind turbines in the United Kingdom Wind turbines on buildings |