Quellenangaben für die verwendeten Bilder und Grafiken:

Glühbirne - © Falko Matte - Fotolia.com
happy family - © Liv Friis-larsen - Fotolia.com
mutter und kind - © Ramona Heim - Fotolia.com
Portrait of attractive young female showing a thumbs up - © Yuri Arcurs - Fotolia.com
Gasherd © by-studio - Fotolia.com
gear - © Pavel Marchuk - Fotolia.com
pile of books with one book open on white background - © ctacik - Fotolia.com
Portrait of beautiful secretary isolated on white - © Dash - Fotolia.com
Wood pellets -© MiodragNikolic - Fotolia.com
fireplace 5 - © Patrizia Tilly - Fotolia.com
Bagger - © Blende-8 - Fotolia.com
LKW - © Thaut Images - Fotolia.com
Pile of coal - © Nigel Monckton - Fotolia.com
truck driving on country-road/motion - © Mikael Damkier - Fotolia.com
gestapelte Holzbriketts vor weissem Hintergrund - © cmnaumann - Fotolia.com
Holzbriketts - © Wieselpixx - Fotolia.com
Holzbriketts © abcmedia - Fotolia.com
butler diener service tablett - © eyeami - Fotolia.com
trees and lawn on a bright summer day - © Elnur - Fotolia.com
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