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Principles of Toxicology, Threat of Damage to Environmental Resources - Essay Example

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From the paper "Principles of Toxicology, Threat of Damage to Environmental Resources" it is clear that the author has learned the principles of toxicology in the first lecture. There are three key points we have to remember: the first is that the dose matters; second, people differ; and, third, things change…
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Extract of sample "Principles of Toxicology, Threat of Damage to Environmental Resources"

By the eighth week Professor Hayes tried to bring these points together to talk about risk assessment, the processes we use to assess whether or not there is a risk in putting on the market product. 

The Professor started by introducing the definition of risk, which means the threat of damage to environmental resources, human health, and or the occurrence of a particular hazard. The process of estimating the environmental resources or human health affected adversely under hazardous conditions is called risk assessment. Risk assessments are made every day; therefore, we have to understand why risk assessment is important to life cycle assessments. To consider the raw materials we have to use and make them into products and consider the energy and emission, and the pollution factors when we think about life cycle analysis, As a result, doing a life cycle analysis to decide whether to reduce the energy, or to reduce the number of raw materials, or to reduce potential pollution comes from the point of an environmental view. And another way is compilation and evaluation of the inputs, outputs and the potential environmental impacts of a product system throughout its life cycle analysis. 

There are two types of risks: natural and man-made. CO2, SO4, CH4, O3 are natural risk types. Man-made risks, such as oil spills into water resources, waste plant disposal into the environment, coal electricity generating plant emits the CO2 into the air, artificial chemical ingredients added into food, pesticide for agricultural process, and chemical component in products, such as Bisphenol A is a chemical added in the production of polycarbonate plastics, such as water, food container. Bisphenol A accounts for the majority of human exposure. First, Bisphenol A is widespread, which has potentially adverse effects on human health. There have been tests already done by the CDC which found out that detectable levels of Bisphenol A in 935 of 2571 urine samples from a sensitive subpopulation of children 6 years and older. This is especially bad because Bisphenol A can leach into food through the human daily diet, and long term use can affect newborns. Also, many studies suggest that children are more sensitive to exposure to Bisphenol-A. When we talked about the chemical ingredients added into food, I think China has a number of food poison issues in the last decades such as milk power poisoning children, and there are issues of lobsterling poison in southern China. Because of a product used for cleaning that damages people’s kidney function and its components, which are citric acid and sub sulfates, this can weaken and dissolve human muscle. Its benefits increase its risk. And China has a number of serious problems with drug and industrial chemical abuse in food because of a lack of monitoring systems.

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