Following the 1970s, non-governmental organizations that focused on environmental education continued to form and grow, the number of teachers implementing environmental education in their classrooms increased, and the movement gained stronger political backing. A critical move forward came when the United States Congress passed the National Environmental Education Act of 1990, which placed the Office of Environmental Education in the U.S. Environmental Protection Agency and allowed the EPA to create environmental education initiatives at the federal level.
In the United States some of the antecedents of Environmental Education were Nature Studies, Conservation Education and School Camping. Nature studies integrated academic approach with outdoor exploration (Roth, 1978). Conservation Education brought awareness to the misuse of natural resources. George Perkins Marsh discoursed on humanity’s integral part of the natural world. The governmental agencies like the U.S. Forest Service and the EPA were also pushing a conservation agenda. Conservation ideals still guide environmental education today. School Camping was exposure to the environment and use of resources outside of the classroom for educational purposes. The legacies of these antecedents are still present in the evolving arena of environmental education.