Foto: "<a href="https://www.ccnull.de/foto/der-spruch-the-best-time-to-plant-a-tree-was-20-years-ago-the-second-best-time-is-now-an-einer-wand-mit-pflanzen/1035508" target="_blank">Der Spruch The best time to plant a tree was 20 years ago. The second best time is now an einer Wand mit Pflanzen</a>" von <a href="https://www.ccnull.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://www.ccnull.de" target="_blank">ccnull.de</a> - <a href="https://www.flickr.com/photos/30478819@N08/50504025512/" target="_blank">Bildquelle</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>