At the invitation of the United Nations (UN Environment; UNEP), Prof. Dr. Andranik Tumasjan gave a keynote presentation on “Blockchain hype or hope? The potential and limitations of blockchain technologies” at the Technology and Innovation Dialogue “Exploring Blockchain Technology and Environmental Sustainability”. The two day dialogue was hosted by UNEP and the Green Growth Knowledge Platform and took place on July 23-24, 2018 at the UNESCO Headquarter in Paris.