404. That’s an error.

The requested URL /_/+1/confirm?hl=de&url=http%3A%2F%2Fwww.windkraft-journal.de%2F2014%2F07%2F04%2Fbafa-veroeffentlicht-evaluation-zur-energiesparberatung-in-wohngebaeuden-vor-ort%2F54525&title=BAFA%20ver%C3%B6ffentlicht%20Evaluation%20zur%20Energiesparberatung%20in%20Wohngeb%C3%A4uden%20vor%20Ort was not found on this server. That’s all we know.