The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for the assessment of climate change.

The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) is the intergovernmental body which assesses the state of biodiversity and of the ecosystem services it provides to society, in response to requests from decision makers.

The Interlaken Group is an informal network of individual leaders from influential companies, investors, CSOs, government and international organizations. The purpose of the Group is to expand and leverage private sector action to secure community land rights.

IAP, an international advocacy organization, wins policy change, boosts local advocacy efforts & supports local activists and communities to access & exchange information on development that affects them. By opening space at influential decision-making spaces, IAP seeks to advance development principles and projects that prioritize human and environmental rights.

The International African Institute (IAI), hosted at SOAS University of London, aims to promote the scholarly study of Africa's history, societies and cultures.

The institute realizes its aims primarily by means of scholarly publishing.

We are one of the world’s leading peacebuilding organisations, with 30 years of experience laying the foundations for peace.

We work with local people in over 25 countries around the world to help them build peace, and we advise governments, organisations and companies on how to support peace.

The International Assessment of Agricultural Knowledge, Science and Technology for Development (IAASTD) is a unique international effort that will evaluate the relevance, quality and effectiveness of agricultural knowledge, science, and technology (AKST); and effectiveness of public and private sector policies as well as institutional arrangements in relation to AKST.

IAIA is an organization with a voluntary membership of professionals from a diverse array of interests and organizations, all of whom are concerned with environmental stewardship and sustainability. Collectively, our goal is to protect, not harm, the earth and its environments and peoples.

The German Chapter of the International Association of Landscape Ecology (IALE) connects landscape researchers, planners, and other interested persons to support a scientifically and planning-related sound development of human-environment relations.

The IASC is the leading professional association dedicated to the commons.