| Book Review | Environmental History, 9.2

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| Book Review | Environmental History, 9.2 | The History Cooperative

Book Review

Border Oasis: Water and the Political Ecology of the Colorado River Delta, 1940-1975. By Evan Ray Ward. Tucson: University of Arizona Press, 2003. xxx + 208 pp. Illustrations, maps, bibliographical references, index. Cloth $45.00.
It is a truism of environmental history that nature rarely respects human boundaries. So it is somewhat surprising that so few local studies dare to cross national borders. With Border Oasis, Evan Ward follows water across an international border, uncovering the fascinating story of a transboundary ecosystem.	1
In its broadest sense, this is a transnational story. The ecosystem that concerns Ward is the Colorado River delta, which straddles the U.S.-Mexican border, forming a fragile but vital environment that has endured the pressures of not one, but two national development impulses. As both nations pursued maximum development of the delta, the quantity and quality of water that crossed the border steadily declined, forcing the two countries to negotiate solutions, first in the 1940s to guarantee Mexico a share of the water and then in the 1960s and 1970s to reduce salinity.	. . .

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