Compost Days is a regional event promoting the practice of home composting of organic matter whose 2023 edition was held from 4 to 10 June in Brussels. This week is an initiative of ACR+ member Brussels Environment and the Minister for the Environment of the Brussels Capital Region. The aim of the week is to promote decentralised composting initiatives in Brussels and to highlight the ease of the gesture: composting is within everyone's reach. During this event, participants were able to visit a composting site, go to their neighbour's composting site and discover different composting techniques.