Unit 5 APES Land and Water Use Review- AP Environmental Science

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Timestamps 0:08 - Tragedy of the Commons » Common resources are exploited at unsustainable rates. 1:22 - Water Resources » Aquifer overdraft 3:35 - Irrigation » Furrow » Flood » Spray » Drip » Impact: Salinization 5:05 - Industrial Agricultural Impacts » Tillage - loosening land for crops but leads to erosion. » Top Soil - holds water and nutrients » Erosion - mitigation methods: cover crops, low till methods. » Desertification - loss of soil productivity » Salinization - result of irrigation evaporation leaving salt/minerals behind. » Integrated Pest Management - control pests through crop rotation, natural predators, GMOs. 7:33 - Mining » Reserves - source we can mine from » Overburden - soil removed when mining » Spoils - waste created by mining » Tailings - residue from mining 8:36 - Mining Impacts 10:10 - Fishing Impacts 12:17 - Aquaculture (Aquafarming) » Benefits: Efficient, uses less land » Impacts: Antibiotic resistance, concentrated waste, escaped fish. 13:37 - Benefits of Forests » Prevents erosion, stores carbon, slows runoff, etc. 14:25 - Deforestation Issues » Allows erosion, more carbon in atmosphere, more runoff, etc. 14:55 - Forest Fires and Cutting » Control Burn - intentional burning of forests » Clear Cutting - efficient but leads to deforestation » Selective Cutting - cuts only certain trees to maintain habitat 16:25 - Rangeland (Tragedy of the Commons issue) » Overgrazing of cattle 17:28 - Urbanization 18:57 - Concentrated Animal Feeding Operation (CAFO) » Benefits: Efficient, uses less land » Impacts: Antibiotic resistance, concentrated waste, eutrophication

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