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Carbon, nitrogen, phosphorus, and water cycles; human impacts on nutrient cycling
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Master the carbon cycle (photosynthesis, respiration, combustion, ocean absorption), nitrogen cycle (fixation, nitrification, denitrification, assimilation), phosphorus cycle (weathering, runoff, sedimentation), and the water/hydrologic cycle (evaporation, transpiration, precipitation, infiltration). Understand human disruptions to each cycle.
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