The Thailand Environment Institute (TEI) is a non-profit, non-governmental, environmental organization, focusing on environmental issues. Established in May 1993 with a working philosophy of serving as a resource for reliable and up-to-date information and knowledge . Founded on the belief that partnerships are the most effective approach in achieving sustainable development and better quality of life, the Thailand Environment Institute advocates for a participatory approach to shared environmental responsibility. By working closely with the private sector, government, local communities, other civil society partners, academia and in international circles with international organizations, TEI helps to formulate environmental directives and link policy with action to encourage meaningful environmental progress in Thailand.