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The top documents tagged [carboniferous era]
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carboniferous era
Energy Resources UNIT 7 STANDARDS: NCES 2.2.2, 2.8.1 LESSON 2.
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Plants to land - What is a plant? - What are the challenges of land? - How were these challenges met? Refer to chapter 23 in text.
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Nuclear Power: Promise and Problems
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Painted Mountain Preview
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