Article 1: Man Influenced Event
Prothero, Donald R. “How We Know Global Warming is Real and Human Caused.” Skeptic 17 (2012): 2.
This article was written following an opinionated editorial that was published challenging the evidence of human-induced climate change. In this article there are numerous lines of evidence that the author claims leans toward the fact that global climate change is manmade. He states that carbon dioxide in our atmosphere has increased over the last 200 years. With this evidence compared to ice cores revealing direct measurements over the last 900 year, the increase in temperature stand outs immensely. The temperature increased during the Industrial Revolution, a time period in which humans released massive amounts of carbon dioxide into the atmosphere through deforestation and the burning of large amounts of coal, gas, and oil. A second Reason that he states humans are the reason behind global climate changes is the polar ice caps melting. The polar ice caps are melting at an alarming rate and will result in less than half of the Artic covered in ice by the time summer comes around. Also with the polar ice caps melting there is also the melting of glaciers. They are retreating at the highest rates ever documented. With the retreating of these glaciers is the depletion of the freshwater supply. The author rebuts the statements of those who believe climate change is natural by saying that the climate is warmer than other warm phase the Earth has been through. The reason the Earth is going through this period of abnormal warmth is due to the climate not having been exposed to the greenhouse gases previously. He states that the amount of heat that the sun provides has been decreasing since 1940 and that the amount of carbon dioxide in the atmosphere has been thrown off by human’s excess production of it.
Article 2: Man Influenced Event
Pawlik, Kurt. "The Psychology of Global Environmental Change: Some Basic Data and an Agenda for Cooperative International Research." Taylor and Francis. N.p., n.d. Web. 25 Feb. 2013..
The article is based on global climate change being a man-made event. In the first portion of this paper, existing evidence, mostly from earth and atmospheric sciences, on global climatic changes and the effect of human action is briefly reviewed. The author describes the term “Global Change” of having different meanings, some more general and others more restricted. Data that is shown in this article reflects the last post-glacial cycle of variations in air temperature and air carbon dioxide concentration in a time scale of 100,000 to 150,000 years, an increase in mean air temperature at the earth's surface over the last 100 years, and summarizes carbon dioxide concentration measures obtained from the analysis of Antarctic ice cores and at the Mauna Loa Observatory. As described by the author, there are greenhouse gases other than carbon dioxide, including methane, nitrous oxide, tropospheric ozone and chlorofluorocarbons. To a large extent, the concentration of these greenhouse gases is due to increased burning of biomass or fossil fuel, and chemical waste from rapidly growing populations, including man. The rapid growth in human world population, its wasteful use of land and of natural resources, and waste from growing industrialization and traffic, are among the primary sources of the human-made global warming. These causes and effects are coincidental with several worldwide changes in human living conditions. These other aspects of global change relate to increasing stratospheric ozone depletion, acid deposition specifically in acid rain, loss of biodiversity, and a sharp increase in human world population. In conclusion of this paper, without suitable intervention, the greenhouse effect as described today will be amplified substantially due to growth in world population, resulting in still increasing rates of emission of organic and...
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