![These images were created using raytracing to compute shadows and reflections and produce an artistic view of El NiƱo events.](https://webarchive.library.unt.edu/web/20090807171504im_/http://www.free.ed.gov/images/resources/06118.jpg)
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Visualization Projects includes simulations of more than 40 phenomena: sea ice and CO2, climate change (230-year...
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![NASA's Total Ozone Mapping Spectrometer (TOMS) instruments provide global measurements of total column ozone on a daily basis.](https://webarchive.library.unt.edu/web/20090807171504im_/http://www.free.ed.gov/images/resources/chemlinks.jpg)
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ChemLinks Coalition offers resources for the first 2 years of college chemistry. Topics include global...
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![When ocean currents flow over large distances, water of one temperature is carried into zones of another temperature.](https://webarchive.library.unt.edu/web/20090807171504im_/http://www.free.ed.gov/images/resources/global-change1.jpg)
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Global Climate Change offers a window into the world of scientific research on climate change. Learn about...
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![A floating iceberg off the Antarctic Peninsula. Photo courtesy CU-Boulder National Snow and Ice Data Center.](https://webarchive.library.unt.edu/web/20090807171504im_/http://www.free.ed.gov/images/resources/global-change.jpg)
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