According to the March 1998 Executive Summary from the Office of the Chief Scientist at NOAA what are the Earth's last unexplored frontiers?

According to the March 1998 Executive Summary from the Office of the Chief Scientist at NOAA, the Earth's last unexplored frontiers include the deep ocean, which remains largely uncharted and poorly understood, and the polar regions, which are crucial for understanding global climate systems. Additionally, the document highlights the significance of biodiversity in these areas and the need for advanced technologies to explore and monitor these environments. These frontiers hold critical insights for science, conservation, and resource management.