As a subject matter expert in geography and international relations, I am well-versed in the intricacies of territorial control and the geopolitical nuances that define the management of shared natural resources. The Great Lakes, a magnificent system of freshwater lakes situated primarily in North America, is a prime example of such a resource that transcends the boundaries of a single nation.

The Great Lakes are comprised of Lakes Superior, Michigan, Huron, Erie, and Ontario. They hold approximately 84% of North America's surface fresh water and about 21% of the world's surface fresh water. The region is indeed a bi-national one, encompassing parts of the United States and Canada. The U.S. states involved are Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin. The Canadian province that is part of this region is Ontario.

It is important to clarify that the term "control" can be interpreted in various ways. If we are referring to the political or administrative control, then it is a shared responsibility between the United States and Canada. Both countries have jurisdiction over different portions of the lakes, as determined by historical treaties and agreements.

However, if we consider "control" in terms of usage and management, the situation is more complex. The Great Lakes are a shared resource, and their management involves a collaborative effort between the two countries. The Great Lakes Water Quality Agreement of 1972, and its amendments, is a key treaty between the United States and Canada that guides the cooperative management of these waters. This agreement aims to protect and restore the chemical, physical, and biological integrity of the waters of the Great Lakes.

In terms of economic control, industries and communities around the Great Lakes rely heavily on this resource for drinking water, agriculture, tourism, and transportation. Both countries have vested interests in ensuring the sustainability and health of the Great Lakes. They work together to address issues such as pollution, invasive species, and climate change impacts.

To answer the question directly, no single country "controls" most of the Great Lakes. The Great Lakes are a shared resource, and their governance is a testament to the successful cooperation between the United States and Canada. The management of these lakes is a joint effort, with both countries playing crucial roles in ensuring their protection and sustainable use.

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The Great Lakes region of North America is a bi-national Canadian-American region that includes portions of the eight U.S. states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania and Wisconsin as well as the Canadian province of Ontario.read more >>