What do you do when your pencil turns into a useless stub? You throw it into the trash, right? But you might also plant it into a flower pot and grow basil. That would be a genuine option whenever you use a pen manufactured by the Danish company Sprout. What sound like a gimmick turns out to be a successful business. European Business talked to its Founder Michael Stausholm about the definition of sustainability, taking small eco-friendly steps and why he is the test person for new Sprout varieties at his office.