The National Parks Service defines Traditional Ecological Knowledge (TEK) as "the on-going accumulation of knowledge, practice and belief about relationships between living beings in a specific ecosystem that is acquired by indigenous people over hundreds or thousands of years through direct contact with the environment, handed down through generations, and used for life-sustaining ways."
Indigenous Environmentalists are advocating for the inclusion of TEK in the ENVS field in order to combat enviornmental problems.
U.S. National Park Service. (2020, December 23). Traditional ecological knowledge (U.S. National Park Service). https://www.nps.gov/subjects/tek/index.htm