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"ICESat (Ice, Cloud, and land Elevation Satellite) is the benchmark Earth Observing System mission for measuring ice sheet mass balance, cloud and aerosol heights, as well as land topography and vegetation...
From the USGS Water Science for School's web site is a comparison of the disadvantages to power plants that use coal and oil to the advantages of hydroelectric power.
From the USGS Water Science for School's comes this information on what wastewater is and why it is treated, by looking at the potential ways it can affect fisheries, wildlife habitats, recreational sites, and human...
This resource describes the pH scale and how changing pH levels affect water and the environment.
This resource from the United States Geological Survey contains information for students on the many aspects of water; includes pictures, data, maps, an interactive center where you can give opinions and test your water...
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