Madaline Baranski
Theresa White
Public Speaking 101
October 8, 2017
Title : What is “Global Warming”?
General purpose: Is to educate the audience on the effects of climate change.
After listening to my speech, the audience will be able to identify causes and effects of climate change.
Introduction
“Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.” -Bill Nye
The Earth is a little over 4.5 billion years old, humans have only been around for 200,000, a mere 0.004% of earths history, and we have double the amounts of carbon dioxide in the atmosphere since the 1960s.
Important questions to ask yourself when discussing climate change is, what exactly is global warming, are temperature changes natural, and what can we do about it?
Body
What is …show more content…
While levels of greenhouse gases have fluctuated throughout time, they have recently been consistent. The same is true for the average global temperature.
II. Are temperature changes natural?
The Industrial Revolution was the turning point for climate change, before that, the changes were not exclusively human related. Even before humans the global temperatures fluctuated on a cycle of hundred of thousands of years as the Earth’s position relative to the sun has varied. Thus, ice ages have come and gone.
Natural causes as still in play today but their effects are too slow for the causes seen in today’s environment. Swedish physicist Svante Arrhenius predicted in 1860 that carbon dioxide from coal burning would warm the planet.
So while historically climate change has taken thousands of years, we have nearly increased carbon emissions by half since the 1960s, forming a thickening blanket that traps heat at the Earth’s surface. The winds and oceans circulate that heat, causing it to be hotter in some places and cooler in others. Climate
Theresa White
Public Speaking 101
October 8, 2017
Title : What is “Global Warming”?
General purpose: Is to educate the audience on the effects of climate change.
After listening to my speech, the audience will be able to identify causes and effects of climate change.
Introduction
“Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.” -Bill Nye
The Earth is a little over 4.5 billion years old, humans have only been around for 200,000, a mere 0.004% of earths history, and we have double the amounts of carbon dioxide in the atmosphere since the 1960s.
Important questions to ask yourself when discussing climate change is, what exactly is global warming, are temperature changes natural, and what can we do about it?
Body
What is …show more content…
While levels of greenhouse gases have fluctuated throughout time, they have recently been consistent. The same is true for the average global temperature.
II. Are temperature changes natural?
The Industrial Revolution was the turning point for climate change, before that, the changes were not exclusively human related. Even before humans the global temperatures fluctuated on a cycle of hundred of thousands of years as the Earth’s position relative to the sun has varied. Thus, ice ages have come and gone.
Natural causes as still in play today but their effects are too slow for the causes seen in today’s environment. Swedish physicist Svante Arrhenius predicted in 1860 that carbon dioxide from coal burning would warm the planet.
So while historically climate change has taken thousands of years, we have nearly increased carbon emissions by half since the 1960s, forming a thickening blanket that traps heat at the Earth’s surface. The winds and oceans circulate that heat, causing it to be hotter in some places and cooler in others. Climate