Zelena akcija (ZA) is a non-governmental, non-profit, non-political and voluntary association of citizens for environmental protection. It was established in 1990 and is based in Zagreb, Croatia.

Through our work we want to contribute to the improvement of environmental protection system at the local, national and global level by encouraging changes through campaigns, non-violent direct action, projects and public participation in decision-making. The aim of our work is to protect the environment and nature and encourage the development towards a low-carbon society based on the principles of social justice and systemic change. We especially promote activities aimed at encouraging public participation in decision-making regarding environmental issues and on improving the quality of life in Croatia.

Zelena akcija is a member of the largest network of environmental NGOs in the world - Friends of the Earth.