The chapter "Let’s clean Slovenia in one day: ORGANIZATION" outlines the planning and logistics for a one-day clean-up event in Slovenia. All municipalities are participating, and the local organizer's role includes coordinating with NGOs and umbrella organizations such as the mountaineering association. Local volunteer fire brigades will assist with various tasks, including registering gathering points for volunteers, searching for dump sites, and helping with waste transport. The timeline for the event is also provided.The chapter "Let’s clean Slovenia in one day: ORGANIZATION" outlines the planning and logistics for a one-day clean-up event in Slovenia. All municipalities are participating, and the local organizer's role includes coordinating with NGOs and umbrella organizations such as the mountaineering association. Local volunteer fire brigades will assist with various tasks, including registering gathering points for volunteers, searching for dump sites, and helping with waste transport. The timeline for the event is also provided.