Title: “Global Warming”
General Purpose: To persuade
Specific Purpose: After listening to my speech, audience members will be aware of global warming and take steps to reduce the effects. Thesis: The consequences of global warming jeopardises the current and future generation.
I. Attention getter : Comparison of the globe decades ago and now II. Thesis statement III. Preview of main points
I. What are the factors of global warming?
* Gases include CO2 , Methane, Nitrouos oxide, CFC and etc, * Most of this has been influenced by industrialization which results in emission of gases like CO2 * China, among the leading industrialized countries that contribute to global warming. B. Deforestation
* High population growth
* Trees once present they absorb the CO2 released by burning of fossil fuels. * The growth of world population has led to cutting down trees (deforestation) so as to expand settlements and higher demand for timber for domestic purposes. C. Natural factors
* Volcanic eruptions result into the emission of gases that concentrate in the atmosphere increasing the green house effect. * Water vapour and atmospheric humidity * Solar variation
II. What are the effects of global warming?
A. Rise in sea-levels worldwide due to melting glaciers. * According to NASA, the polar ice cap is now melting at the alarming rate of 9 percent per decade. Arctic ice thickness has decreased 40 percent since the 1960s. * At the current rate of retreat, all of the glaciers in the Glacier National Park will be gone by 2070 * Greenland holds 10 percent of the global ice mass. If it melts, sea levels could increase by up to 21 feet. B. More killer storms and...
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