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Informativespeechoutline.pptxInformative speech outline
Jasmin Linthicum
Found of oral communication
Prof, Perkins Pamela
11/2/2020
Introduction
Thesis statement: over the past decades there have been climates changes which is caused by various factors.
Three main points:
Human causes
Natural causes
Disturbance to the climate system
The different causes of climate change are like human causes such as adjustments in the constituents of the land use or the atmosphere, natural causes such as volcanoes eruptions, or internal changes in the climatic conditions, and lastly disturbance to the climate system.
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Body
Natural causes
Human causes
Disturbance to the climate system
Natural causes
Natural cycles can make the climate to vary between cooling and warming
The Milankovitch cycles – As the Earth moves around the sun, the slant of its axis and its path change to some extent. (Resnik 2016)
Although these natural aspects make the climate to change, they are not the primary causes according to scientific knowledge.
These modifications impact the quantity of sunlight that reaches the Earth
All these results to Earth’s temperature change.
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ii. Human causes
Human beings lead to a change in climate by allowing greenhouse gases like carbon dioxide into the atmosphere
Altering the amounts of aerosols sprays and modifying the reflectivity of Earth’s surface by altering earth surface. (Manou and Mihr 2017)
Currently, the amount of carbon dioxide in the air has increased than ever in the last 800,00 decades
Human actions inspire climate change by increasing amount of carbon (iv) oxide and many other greenhouse gases present in the air.
Besides the direct impact, the warming that comes from higher concentrations of long-lasting greenhouse gases can be augmented by other processes.
All those contribute to climate change
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iii. Disturbance to the climate system
A close relation exists amidst atmospheric water vapor, the number of prolonged greenhouse gases in the atmosphere, earth temperature and the extent of the polar ice sheets.
These traceable fluctuations interfere with the distribution of the solar energy reaching the earth surface. (Hannah 2015)
If one of the above aspects is altered or disturbed, the other factors also respond through “feedback” developments which may intensify or dampen the initial disturbance state.
The feedbacks take place on an extended series of time scales: like those influencing the atmosphere are rapid in nature
Thus causing variation in temperatures which in turn triggers changes in the carbon cycle
Ice sheets among others; that constitute to the amplified changes in temperature response.
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Conclusion
some of the causes of climate change can be natural or human causes such greenhouse gases and natural causes for instance, the Milankovitch cycles.
Human beings have proven to be the primary cause of climate change.
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Works Cited
Hannah, Lee. "The Climate System and Climate Change." Climate Change Biology, 2015, pp. 13-53.
Manou, Dimitra, and Anja Mihr. "Climate change, migration and human rights." Climate Change, Migration and Human Rights, 2017, pp. 2-8.
Resnik, David B. "Climate Change: Causes, Consequences, Policy, and Ethics." Bioethical Insights into Values and Policy, 2016, pp. 47-58.
