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The top documents tagged [oxygen content slide]
Air Earth Crust Oxygen on Earth H 2 O (oceans) O 2, CO 2 (atmosphere) CO 3 (rocks, coral, seashells) SiO 2, silicates (sand, clay, rocks) Made commercially
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Atmosphere Water and Air… the two essential elements on which life depends have become global garbage cans
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Intertidal Ecology Rocky Shores Sandy Shores: sandy beaches Muddy Shores: mud flat
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