Why should anyone else care about what I do with my sewage on my own .pdf

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Why should anyone else care about what I do with my sewage on my own property? Integrate specific examples from course material in your response. Solution Anyone is going to care what you are going to do with house hold sewage generation and disposal of sewage into the environment because sewage may causes high environmental problem - climate change due to presence more non-degradable phosphorous & organic compounds. Human impacts on environmental change via sewage are leading to the following imbalance in the ecosystem at trophic levels. Household-sewage and toxic lead pollutants are other factors responsible for death of the photosynthetic microalgae & macroalgae result in dead zone with photosynthetic biomass. This dead zone formation is mainly have higher impact on nitrogen cycle level of water and nitrogen cycle is going to increase due to higher farm fertilizers mixing into the aquatic zone via storm water finally bacterial activity is going to reduce “dissolved oxygen level” available to the other aquatic species dramatically via aerobic respiration.

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Describe how human activities are altering each of the nutrient cycles Solution The earth’s sustainability is very much dependent on the maintaining of its state of equilibrium. This state of equilibrium also determines the functioning of the ecosystem, which is restored through nutrient cycles. In recent years, there has been an increasing awareness that human activities have affected the earth sustainability in one way or another. Human activities that are known to be environmentally unfriendly, such as deforestation and fossil fuel burning, have directly and indirectly changed the biogeochemical and physical processes which affects the earth’s climate. Nutrient cycles always involve the achievement of equilibrium states, a balance in the cycling of the element between spheres. However, achieving these equilibrium states requires overall balance which usually involves elements being distributed on a global scale. Hence, a disruption in one cycle would result in the disruption in all other cycles. Below are some ways how human activities have contributed to the disruption of nutrient cycles. Use of Phosphorus fertilisers: The introduction and use of commercial synthetic fertilisers to boost plant growth are the main contributors to humans’ influences on the phosphorus cycle. As plants may not be able to utilise all of the phosphate fertiliser applied, which results in the phosphate fertilisers being transferred through the water run-off to water bodies in that area. This excessive run-off of phosphate eventually end up in streams or other water bodies which results in the changes of habitats and their equilibrium, and is eventually precipitated as sediments at the bottom of the water bodies. Other human sources of phosphate include the outflows from sewage treatment plants. Without the proper tertiary treatment which is expensive, the phosphate in the sewage would not be removed during various treatment operations, resulting in an extra amount of phosphate entering the water bodies and polluting them. As phosphate are released in small amounts in its accessible form in its original natural cycle, this extra phosphate released by human activities results in a change in the original phosphate cycle. This extra phosphate in water bodies are also a major contributor to the process of eutrophication, which causes excessive growth of water plants and algae populations. Usage of Fossil Fuels and Reduction of Carbon Sinks: Fossil fuels are one of the reservoirs for carbon in the carbon cycle. Mining of fossil fuels from the earth crust and using them to generate electricity especially since the industrial revolution has resulted in the release of carbon in the form of carbon dioxide into the atmosphere in large amounts. Further exacerbating the change in the carbon cycle, other human activities such as the clearing of vegetation, through deforestation or cutting of plants, results in lesser carbon sinks, further increasing the concentration of carbo.

Find all elements of our ring R that have norm 1. Show that no element has norm 2 or 3. Solution a) This element is clearly non-zero, and not a unit. If it is a product of two non-units, then its norm is a product of two integers of absolute value greater than 1, a contradiction b) for this we will assume that P is the principal We need to show that P s not principal, since P^2= (2) (easy to check by direct computation) its order in the class group divides 2, Now P has one generator , then the norm of this generator is 2 so we can say in the equation it has no principal it means if it has no principal with elements it has no norm so we orove for 3 similarly.