Prevalence, Causes and Impacts of Global Warming Essay

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The third day of summer of 1988 in Washington D.C, temperatures touched 101° F. The very same day, it was for the first time in the history that NASA scientist James Hansen gave a memorable yet startling testimony before U.S Senate Committee on Energy and Natural Resources (Hansen 2000: 9876). The two key pieces of information presented were that the earth is getting warmer at a relatively faster rate and analysis of data and records reflected that the global warming is linked to greenhouse gas emission (Hansen 2000: 9876). James Hansen ended his testimony by stating that if temperatures continue to rise, the planet would face disastrous global climate changes that could cause tremendous amount of harm to our planet (Hansen 2000: 9876).…show more content…
The Earth’s average surface temperatures have risen almost by 0.80°C over the last 100 years (Graham 2010: 8-46). Global sea levels have risen by almost 7 inches (17 centimeters) (Graham 2010: 8-46). The rate of rise in average temperature and sea levels in the last half of the century was double to that of the entire 20th century (Graham 2010: 8-46). The majority of the warming and rise in sea level has occurred since 1970’s (Graham 2010: 8-46). This alarming increase in rate in 21st is reflected by the fact that 10 of the warmest years of all-time have occurred in the last 15 years (Graham 2010: 8-46). This increase in temperature affects the oceans the most. Majority of the heat is absorbed by the large water bodies, the temperature of top layer of oceans has increased by 0.302 degrees Fahrenheit since 1970s’ (Graham 2010: 8-46). The ice sheets of Greenland and Antarctic have significantly declined in mass (Edwards 2008: 1-11). According to NASA's Gravity Recovery and Climate Experiment Greenland lost approximately 200 cubic kilometers of ice per year, on the other hand Antarctica lost about 15o cubic kilometers of ice between the years of 2002 and 2005 (Edwards 2008: 1-11). Finally, the last key piece of evidence for global warming is the acidification of ocean water. As
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