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1. Multimedia Exposure Assessment Model (MULTIMED) [EPA_MULTIMDP]
The Multimedia Exposure Assessment Model (MULTIMED) for exposure assessment simulates the movement of contaminants leaching from a waste disposal facility. The model consists of a number of modules ...

2. Ask-A-Geologist: a Virtual Help Desk [01-virtual_help-Geol-99]
Ask-A-Geologist is an online virtual help desk designed to provide answers to geologically based questions. Submitted questions are answered by one of several USGS employees, retirees, and contractors ...

3. USDA Foreign Agricultural Service Metadata Explorer [USDA_PECAD_METADATA_EXPLORER]
The Production Estimates and Crop Assessment Division (PECAD) of USDA's Foreign Agricultural Service (FAS) is responsible for global crop condition assessments and estimates of area, yield, ...

4. Water on the Web Internet Map Server Sites [Waterontheweb]
The Water on the Web Internet Map Server site helps college and high school students understand and solve real-world environmental problems using advanced technology. The website contains two sets ...

5. The David Rumsey Map Viewer [David_Rumsey_Maps]
The David Rumsey GIS Viewer allows on-line visitors a unique opportunity to easily interact with, integrate, and visualize these historic maps along with the modern geospatial data from NASA, USGS, ...

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