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Quellenangaben für die verwendeten Bilder und Grafiken: © tinadefortunata / Fotolia.com; © Kzenon / Fotolia.com; © Halfpoint / fotolia.com; © grafikplusfoto / fotolia.com; Hintergrund: © Rainer Sturm / PIXELIO; Aktuelles: © M.E. / PIXELIO; Strom: © Joachim Kirchner/pixelio, birgitH / PIXELIO, © Andreas Morlok / PIXELIO, © Thorben Wengert / PIXELIO, © Dr. Klaus-Uwe Gerhardt / PIXELIO, © Bernd Kasper / PIXELIO, © Lupo / PIXELIO, © Thorben Wengert / PIXELIO; Erdgas: © Cisco Ripac / PIXELIO, © GG-Berlin / PIXELIO; Service: © Thorben Wengert / PIXELIO, © Lupo / PIXELIO, © Rainer Sturm / PIXELIO, © Tim Reckmann / PIXELIO, © H.D.Volz / PIXELIO; Wissenswertes: © Tony Hegewald / PIXELIO, © Thomas Max Müller / PIXELIO, © Ralf Scheer / PIXELIO, © Lupo / PIXELIO; Netzbetrieb: © Wilhelmine Wulff / PIXELIO, © NiRo / PIXELIO, © Uwe Schlick / PIXELIO, © Rolf Kurschat / PIXELIO, © H.D.Volz / PIXELIO; Netz Strom: © NiRo / PIXELIO, © Marco Barnebeck / PIXELIO, © Rainer Sturm / PIXELIO, © Tony Hegewald / PIXELIO, © Martin Berk / PIXELIO, © Alexander Klaus / PIXELIO, © GG-Berlin / PIXELIO, © Andreas Hermsdorf / PIXELIO, © Tim Reckmann / PIXELIO, © Andreas Morlok / PIXELIO, © H.D.Volz / PIXELIO, © Tim Reckmann / PIXELIO, © Rainer Sturm / PIXELIO; Netz Erdgas: © NiRo / PIXELIO, © uschi dreiucker / PIXELIO, Rainer Sturm / PIXELIO, © Tony Hegewald / PIXELIO, © Cisco Ripac / PIXELIO, © GG-Berlin / PIXELIO, © Andreas Hermsdorf / PIXELIO, © Rainer Sturm / PIXELIO, © Cisco Ripac / PIXELIO, © JuwelTop / PIXELIO, © JUREC / PIXELIO, © Rainer Sturm / PIXELIO; Unternehmen: © NiRo / PIXELIO, © Rainer Sturm / PIXELIO