Sea Shepherd Conservation Society is a non-profit organization dedicated to protecting marine life and habitats. It is known for its direct action campaigns against illegal fishing and other threats to marine ecosystems.

The National Park Service is a federal agency within the U.S. Department of the Interior that manages and protects national parks, national monuments, and other federal lands.

The International Union for Conservation of Nature (IUCN) is a global organization that works to protect endangered species and their habitats. It is known for its Red List of Threatened Species, which assesses the conservation status of species worldwide.

The Food and Agriculture Organization (FAO) is a specialized agency of the United Nations that works to promote sustainable agriculture and food systems. It provides technical assistance and support to countries in developing and implementing policies and programs to improve food security and nutrition.

The Forest Stewardship Council (FSC) is an international non-profit organization that promotes responsible forest management. It certifies forests that meet its standards for environmental, social, and economic sustainability.

The Intergovernmental Panel on Climate Change (IPCC) is a scientific body that assesses the latest scientific, technical, and socio-economic information on climate change. It provides policymakers with regular assessments of the state of climate change, its impacts, and potential future risks.

The International Renewable Energy Agency (IRENA) is an intergovernmental organization that promotes the adoption and sustainable use of renewable energy. It provides policymakers with technical assistance and support in developing and implementing renewable energy policies and programs.

The International Transport Forum (ITF) is an intergovernmental organization that promotes sustainable transportation and reduces greenhouse gas emissions from the transportation sector. It provides policymakers with technical assistance and support in developing and implementing sustainable transportation policies and programs.

The Global Sustainable Tourism Council (GSTC) is an independent organization that sets standards for sustainable tourism. It certifies tourism businesses that meet its standards for environmental, social, and economic sustainability.

The United Nations Environment Programme (UNEP) is a specialized agency of the United Nations that promotes sustainable consumption and production and reduces the environmental impacts of products and services. It provides policymakers with technical assistance and support in developing and implementing sustainable consumption and production policies and programs.

The United Nations Educational, Scientific and Cultural Organization (UNESCO) is a specialized agency of the United Nations that promotes environmental education and raises awareness about environmental issues. It provides policymakers with technical assistance and support in developing and implementing environmental education policies and programs.

The Environmental Justice Foundation (EJF) is an international non-profit organization that promotes environmental justice and addresses the disproportionate environmental impacts on marginalized communities. It provides technical assistance and support to communities in developing and implementing environmental justice policies and programs.

The Global Reporting Initiative (GRI) is an independent organization that promotes corporate social responsibility and encourages businesses to adopt sustainable practices. It provides businesses with a framework for reporting on their environmental, social, and economic performance.

The United Nations Environment Programme Finance Initiative (UNEP FI) is a global partnership between the United Nations Environment Programme (UNEP) and the financial sector. It promotes sustainable finance and encourages financial institutions to invest in sustainable projects and businesses.

The World Commission on Environment and Development (WCED) was a global commission established by the United Nations in 1983 to address the challenges of sustainable development. It published the report "Our Common Future", which popularized the concept of sustainable development and influenced the development of international environmental policies.