It seems you have a list of geographic features, bodies of water, and ecological details pertaining to North America, particularly relating to Mexico, Canada, and the surrounding regions. Here’s how the items connect:
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Mexico: A country in North America, bordered to the north by the United States and to the south by Central America.
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Great Lakes: A group of five large freshwater lakes (Superior, Michigan, Huron, Erie, and Ontario) located in North America. The lakes serve as a natural border between the U.S. and Canada.
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Rio Grande: A river that acts as a natural border between the U.S. and Mexico.
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Cascade Range: A mountain range that extends from British Columbia in Canada down through Washington, Oregon, and into Northern California in the U.S., known for its volcanic activity (including Mount St. Helens).
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Neartic: A biogeographic region that includes North America and parts of northern Asia, characterized by a diverse range of ecosystems.
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Isthmus of Panama: A narrow strip of land connecting North and South America, not directly related to the Great Lakes, Rio Grande, or Cascade Range but important in a broader geographical context.
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Guatemala: A Central American country located to the southeast of Mexico, lying near the Cocos ocean plate.
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Lake Erie: One of the Great Lakes, which is also recognized for its biodiversity.
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Sierra Gorda: An ecoregion located in Mexico that is known for its rich biodiversity and endemic species.
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Nearly 20% of the world's fresh surface water: This refers to the Great Lakes region, which holds a significant portion of the world’s fresh water.
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Location of Mount St. Helens: It is situated in the Cascade Range in Washington state, known for its volcanic activity.
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One of only 17 countries recognized as mega-diverse: Mexico is among these countries due to its high level of biodiversity and numerous endemic species.
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An endangered species found in Sierra Gorda: The region is home to various endangered species, contributing to its ecological significance.
If you need further clarification or specific details about any of these aspects, feel free to ask!