Use the magnifying glass icons above to zoom in or out of the timeline menu. You can also drag the timeline from side to side and select specific events directly. You can also view the timeline in a new window.

The timeline above was adapted from the following sources:

• The Roots of Environmental Education: How the Past Supports the Future by Edward J. McCrea (2006)

• The History and Philosophy of Environmental Education by Robert L. Carter and Bora Simmons (2010)

• 15 Years of the Environmental Education and Training Partnership (EETAP): An Unexpected Journey by Lori Mann (2011)

• Environmental Literacy Report 2015 by the National Environmental Education Foundation (2015)