The document discusses the roles of several major international non-governmental organizations (NGOs) working in the area of environmental protection and conservation. It provides brief overviews of 15 NGOs, including their founding year, type of organization, focus areas, and roles in areas like biodiversity conservation, sustainable development, climate change mitigation, wildlife and habitat protection, and sustainable resource management. The NGOs discussed work to protect the environment through advocacy, research, education, community initiatives, and policy influence on both national and international levels.