ENVIRONMENTAL SCIENCE 8 Essay Example | Topics and Well Written Essays - 500 words

ENVIRONMENTAL SCIENCE 8 - Essay Example (New World Encyclopaedia) EPA is the most comprehensive regulatory agency for environmental concerns. There are several legislations such as Clean Air Act, Clean Water Act, United Nations Environment Programme, Energy Policy Act etc. for tackling the environmental issues. Climate change is caused due to imbalance between the incoming solar radiation and the outgoing heat of the earth. Human influences, Orbital variations, Solar Output, Volcanism, Plate tectonics and Ocean variability are the causes of climate change. Climate change can be prevented from reaching dangerous levels by reducing emissions through efficiency, substitution and sequestration. Conservation of energy, habitat, water, wetland, wildlife, marine life and soil helps restore ecological balance. The costs associated with loss of biodiversity is high and can lead to deteriorating ecological balance, hence sustainable development and consumption can help to conserve biodiversity. Non-Point Source Pollution is the sour ce of water problems and to mitigate this we must achieve zero discharge of pollutants as per the Clean Water’s Act.

John Snow and Epidemology Essay Example | Topics and Well Written Essays - 500 words

John Snow and Epidemology - Essay Example He attended day school because of his family background; his father could only afford that because he was an unskilled laborer. Snow was a bright student; his best subject was mathematics and he did well in that and on other subjects. Simmons (2002) reveals that Snow graduated from the University of London in 1843 and he also obtained a doctorate in medicine a year later. John Snow’s epidemiological studies assisted in finding the root of cholera in London in 1854. A number of diseases had affected the residents of England prior 19th century, some include plague in 1665. However, there was an epidemic of cholera in 1831 thought to have been brought by travellers and merchants from parts of Asia. Cholera was a serious threat to the population of England. Medical experts were confused, but John Snow came to their rescue. He revealed that Cholera was caused by a certain agent in London water. Previously before his revelation or theory, the other physicians attributed the spread of cholera to filthiness of London City (Simmons, 2002). The previous theories relating to the spread of cholera pointed out that it was an airborne disease. This was in mid-19th century whereby physicians thought that cholera concentrated at the low levels altitudes. Workers and merchants in slaughterhouses were causing the spread of cholera according to Miasmatists. The Miasmatists explained that the foul smell from the slaughterhouses was the causing the spread of cholera. John Snow refuted their claims saying that the workers who frequently works at the slaughterhouses inhales miasmus. They have however not been the targets of cholera. He meant that the inhalation of miasmus did not cause the spread of cholera. The spread of Cholera according to Snow was caused by ingestion of morbid matter related to cholera (Ramsay, 2006). Relationship between host, agent and environment increases the spread of the disease. The three aspects exist independently, but their integration will lead to