The text announces the upcoming IV International Congress on Green Public Procurement and Climate Change, which will take place on October 2nd and 3rd, 2024 at the University of Alcalá in Spain. The conference is organized by the Green Public Procurement research group at the university, in collaboration with the Public Procurement Observatory and the International Center for Environmental Law Studies. The call for papers is open until May 27th, and submissions can cover various topics related to green public procurement and climate change, such as sustainable food, energy efficiency, and sustainable mobility. The abstracts should be sent via email and should include the title, authorship, objectives, and results/conclusions. The evaluation results will be communicated by June 17th, and selected papers may be published in the journal Actualidad Jurídica Ambiental or the Public Procurement Observatory. [Extracted from the article]