This UNEP 2021 ECT Guide is designed to provide an overview for policymakers, judges, academics, and stakeholders who are interested in improving the adjudication of environmental disputes. It identifies features of ECTs, describes good practices and provides road maps for institution-building to support the achievement of the United Nations Sustainable Development Goals, particularly Sustainable Development Goal 16 “Peace, Justice and Strong Institutions”, which seeks to promote peaceful and inclusive societies for sustainable development, provide access to justice for all and build effective, accountable and inclusive institutions at all levels.