Global Warming speech to inform/persuade
A. "Global warming is the observed increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.
B. The average global air temperature near Earth's surface has risen about 0.74 °Celsius (1.3 °Fahrenheit) in the last century
C. Models of global warming referenced by the Intergovernmental Panel on Climate Change (IPCC) predict that global temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100. The range of values reflects the use of future greenhouse gas emissions as well as uncertainties regarding climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if no further greenhouse gases are released after this date. This is because of the long average atmospheric lifetime of carbon dioxide (CO2). D. Thesis: There are many things we can do as individuals or as a mass to prevent global warming and we need to take those steps as soon as possible. II.Need-Rationale
A. Need Statement: Global warming effects everyone although its effects are not yet evident the future generations will be fighting the effects that we create today.
B. Evidence:There is a lot of evidence pointing to the futures problems with global warming. First is the rise in temperature we have already had in the last ten years alone the average global temperature has risen more than one degree F. Based on estimates last year(2006) by NASA's Goddard Institute for Space Studies, 2005 was the warmest year since reliable, widespread instrumental measurements became available in the late 1800s. About three-quarters of the anthropogenic (man-made) emissions of CO2 to the atmosphere during the past 20 years are due to fossil fuel burning. The rest of the anthropogenic emissions are predominantly due to land-use change,...
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