"Make taste not waste" or "the greenest way to an excellent cup of coffee" – Already in 2012, the Zurich Commercial Court assessed whether advertising with these general environmental claims (Green Claims) proves admissible under unfair competition law. Cross-sector advertising with such Green Claims is increasingly under scrutiny, with the Swiss Foundation for Consumer Protection filing complaints against several companies. This newsletter addresses Green Claims from the perspective of unfair competition law and highlights issues that companies should be aware of.