In March 2021, Metropolitan Verlag, Regensburg, will publish the fourth Sustainability Yearbook. It contains valuable impulses to face the growing challenges of resource and climate protection and to initiate a transformation to the circular economy and climate neutrality in the economy. In addition to articles on new aspects and developments, the Yearbook contains best-practice examples from companies, presents networks and organizations, and provides an overview of competitions and certificates in the field of sustainability. With "Homo Circularis - Of circularity and reality. And what it all has to do with...