The Hungarian Association of Environmental Enterprises (HAEE) is a nonprofit advocacy organisation, established 30 years ago. They promote protecting biodiversity, achieving the goals of climate policy, conserving natural resources, implementing a circular economy, and also the economical and effective usage of materials and energy. The aim is to improve environmental processes and activities both at national and international level, with special regard to the Carpathian Basin, The Danube River Catchment Area and the V4 cooperation.