Small and medium-sized enterprises (SMEs) are the backbone of the economy and a key player to steer our economy towards a more circular model. However, their small size means that they face unique challenges on the path to closing loops and improving resource efficiency. In an article published in the peer-reviewed journal Sustainability, under lead authorship by Vasileios Rizos from CEPS, Terri Kafyeke, Dr. Martin Hirschnitz-Garbers, and other members of the GreenEcoNet project consortium explore barriers and opportunities faced by SMEs trying to become greener.