Unit 3 Resource Sustainability Nutrient cycles Nutrients chemical substance that an organism must obtain from its environment to sustain life and undergo life processes These nutrients are recycled so they can be reused ID: 1026723
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1. Nutrient Cycles and RecyclingUnit 3: Resource Sustainability
2. Nutrient cyclesNutrients – chemical substance that an organism must obtain from its environment to sustain life and undergo life processes. These nutrients are recycled so they can be reused! Water cycleCarbon cycleNitrogen cyclePhosphorous cycle
3. Water cycle – review!What’s missing?
4. Carbon Cycle – our game!
5. Nitrogen cycle
6. Phosphorous Cycle
7. (Solid) WasteMore to come when we do our trash analysis!Every year, the U.S. generates more than 10 billion tons of solid waste! (divide per person – what do you get?)Can be biodegradable or non-biodegradable. Can it be broken down by biological processes?Usually comes down to natural v. synthetic materials
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9. Waste ManagementLandfills – wastes are put in ground and covered (why?) each day by soil, plastic, or both. Leachate – liquid that forms from passing through a landfillMethane – flammable gas produced from landfillsIncinerators – air pollution; some materials cannot be burned
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11. Reducing Waste/RecyclingBuying less – products with less packaging, or those that last longer and/or are reusableRefillable v. disposable bottles (1965) – Tapped movie!Recycling – saves energy too! Disposable (by you)SortingCleaningUsed to make new productsSold back to you, the consumer!
12. Reducing Waste/Recycling cont.Composting (early slide) – yard waste, fruit/vegetable scrapsEnriches the soil!Plastic bagsDegradable plastics – can break down in the sunlight, or made from sugars (usually just broken down into smaller pieces)