fotolia:
Confident cook smiling - © Yuri Arcurs - Fotolia.com
Netzwerk - Verbindungen und Kontakte - © ag visuell - Fotolia.com    
Blauer Skill-Würfelturm - © ThinMan - Fotolia.com
Energieeffizient - © VRD - Fotolia.com
Gaszähler mit Münzen - © by-studio - Fotolia.com
Energiekosten und Effizienz - © DOC RABE Media - Fotolia.com
Thema Strom / Energie - © Coloures-pic - Fotolia.com

istockphoto:
Set of color flag pins - Grafik- 05-20-10 © pialhovik - istockphoto.com
Driving to Hamburg - Bild - © froxx - istockphoto.com
Group of business colleagues isolated over white - Bild - © GlobalStock - istockphoto.com
Man Holding a Blank Sign - Isolated - Bild - © Neustockimages - istockphoto.com
Power Lines - Grafik - © jane - istockphoto.com
Chef Holding a Blank Sign - Isolated - Bild - © Neustockimages - istockphoto.com
Futuristic Architecture - Bild - © Nikada - istockphoto.com
Nodes - Grafik - © aleksandarvelasevic - istockphoto.com
Recession Chart - Bild - © alexsl - istockphoto.com
Modern working - Bild - © daneger - istockphoto.com
Good business relationships lead to a harmonious work place - Bild - © kupicoo - istockphoto.com
That's a deal! - Bild - © kupicoo - istockphoto.com
blank sign - Bild - © frender -istockphoto.com