Locted on Cannon Island, Expo '74 was the first of many expositions to have an environmental theme.

LINKS:
Riverfront Park - the lageacy site
A Virtual Visit to Expo '74 - by Mike Fuller
Spokane's Expo '74: A World's Fair for the Environment - from the Center of the Study of the Pacific Northwest
Expo '74 Videos - hosted on YouTube
Expo 74 Spokane World's Fair Opens on May 4, 1974 - from HistoryLink.org
30 Years Later, Man Still Has Expo '74 Goods - from The Spokesman-Review, 22 February 2004
Lesson Twenty-six: Spokane's Expo '74: A World's Fair for the Environment - from the University of Washington
Guide to the Expo '74, World's Fair Records 1965-1975 - from the Northwest Digital Archives