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Background: Blumenwiese © ISO K° – photography – Fotolia.com
Slider_home: compost de restes © Patryssia – Fotolia.com
bread in factory© kuponjabah – Fotolia.com
Frau mit Einkaufswagen im Supermarkt© Gina Sanders – Fotolia.com
bad harvest of sunflower, drought© olesiabilkei – Fotolia.com
Global political map of the world, vector © Arūnas Gabalis – Fotolia.com
Biogas© Visions-AD – Fotolia.com
Water treatment plant with dirty sludge in sedimentation tank© antiksu – Fotolia.com
a different kinds of recyclable waste, isolated on white© winston – Fotolia.com
charts and spreadsheets © lucadp – Fotolia.com
Reste einer Kantine© Stefan Redel – Fotolia.com
Bagger mit Hausmüll© airArt – Fotolia.com
Kläranlage© sunshine – Fotolia.com
Intensive Wastewater Treatment© TheGame – Fotolia.com
Hühnerhaltung© Herbie – Fotolia.com
Matterhorn with flag of switzerland© Günter Menzl – Fotolia.com