There are companies that are 100 percent committed to the topic of sustainability, but whose advertising budget is nowhere near enough to report in detail on all the good approaches. And then there are companies that use a very large advertising budget to make a small commitment to sustainability really big. Is that already greenwashing? Where is the border? How does transparent sustainability communication work? And why do you need it at all? Bernd Eberle talked to Heiko Burrack from new business about this and much more.