Rising 725 feet from the floor of the Colorado River, the Hoover Dam is a majestic monument to our heritage as a resourceful and determined nation. It is a tribute to all who worked on the Hoover Dam and to those who died making history. Many roadblocks stood in the way of completing this project ...
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GLOBAL WARMING IN NORTH AMERICA
The vast North American continent ranges from the lush sub-tropical climate of Florida to the frozen ice and tundra of the Arctic. Within these extremes are two wealthy industrialized countries with diverse ecosystems at risk. Yet the United States and Canada are ...
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