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資料紹介
Global Warming
Will Human-Induced Climate Change Destroy the World?
By Rich Deem
www.GodAndScience.org
Note: This slideshow is NOT meant to be printed. View in slideshow mode only because of extensive builds and animations. Go to the website for a printable copy. Requires PowerPoint 2003 or PowerPoint Viewer 2003.
Click Here for a PowerPoint Presentation with Narration (http://godandscience.org/ppt/global_warming_narration.ppt)
This slideshow present an overview of global warming issues, last updated 8/11/2006. A more detailed analysis of global warming issues is available at http://www.godandscience.org/apologetics/global_warming.html, including a printable PDF version. Auto-run with narration at http://godandscience.org/ppt/global_warming_narration.ppt
Introduction
Is the world getting warmer?
If so, are the actions of mankind to blame for earth’s temperature increases?
What can/should be done about these issues?
Are the potential resolutions worth the cost to implement them?
In examining global warming, we will be looking at questions such as
Is the world getting warmer?
If so, are the actions of mankind to blame for earth’s temperature increases?
What can or should be done about global warming?
Are the potential resolutions to global warming worth the cost to implement them?
History of Earth’s Climate
Earth formed ~4.6 billion years ago
Originally very hot
Sun’s energy output only 70% of present
Liquid water present ~4.3 billion years ago (zircon dating)
Much
資料の原本内容
Global Warming
Will Human-Induced Climate Change Destroy the World?
By Rich Deem
www.GodAndScience.org
Note: This slideshow is NOT meant to be printed. View in slideshow mode only because of extensive builds and animations. Go to the website for a printable copy. Requires PowerPoint 2003 or PowerPoint Viewer 2003.
Click Here for a PowerPoint Presentation with Narration (http://godandscience.org/ppt/global_warming_narration.ppt)
This slideshow present an overview of global warming issues, last updated 8/11/2006. A more detailed analysis of global warming issues is available at http://www.godandscience.org/apologetics/global_warming.html, including a printable PDF version. Auto-run with narration at http://godandscience.org/ppt/global_warming_narration.ppt
Introduction
Is the world getting warmer?
If so, are the actions of mankind to blame for earth’s temperature increases?
What can/should be done about these issues?
Are the potential resolutions worth the cost to implement them?
In examining global warming, we will be looking at questions such as
Is the world getting warmer?
If so, are the actions of mankind to blame for earth’s temperature increases?
What can or should be done about global warming?
Are the potential resolutions to global warming worth the cost to implement them?
History of Earth’s Climate
Earth formed ~4.6 billion years ago
Originally very hot
Sun’s energy output only 70% of present
Liquid water present ~4.3 billion years ago (zircon dating)
Much of earth’s early history erased during late heavy bombardment (~3.9 billion years ago)
This is a big picture examination of the earth’s climate
The Earth was formed around 4.6 billion years ago
And was originally very hot
However, the Sun’s energy output was only 70% of what it is presently
Liquid water was present on the surface around 4.3 billion years ago, according to zircon dating
However, much of earth’s early history was erased during late heavy bombardment, which took place around 3.9 billion years ago
History of Earth’s Climate
Life appeared ~3.8 billion years ago
Photosynthesis began 3.5-2.5 billion years ago
Produced oxygen and removed carbon dioxide and methane (greenhouse gases)
Earth went through periods of cooling (“Snowball Earth”) and warming
Earth began cycles of glacial and interglacial periods ~3 million years ago
The first life forms appeared ~3.8 billion years ago
Photosynthesis began 3.5-2.5 billion years ago,
which produced oxygen and removed carbon dioxide and methane, which are greenhouse gases, from the atmosphere
As a result, the Earth went through periods of cooling, commonly referred to as “Snowball Earth” and subsequent warming
Earth began its current cycles of glacial and interglacial periods around 3 million years ago
Sun
Earth’s Temperature
Solar
Energy
Solar
Energy
The temperature of the earth is directly related to the energy input from the Sun. Some of the Sun’s energy is reflected by clouds. Other is reflected by ice. The remainder is absorbed by the earth.
Sun
Earth’s Temperature
Solar
Energy
Radiative
Cooling
If amount of solar energy absorbed by the earth is equal to the amount radiated back into space, the earth remains at a constant temperature.
Sun
Earth’s Temperature
Solar
Energy
Radiative
Cooling
However, if the amount of solar energy is greater than the amount radiated, then the earth heats up.
Sun
Earth’s Temperature
Solar
Energy
Radiative
Cooling
If the amount of solar energy is less than the amount radiated, then the earth cools down.
Greenhouse Effect
Sun
To a certain degree, the earth acts like a greenhouse. Energy from the Sun penetrates the glass of a greenhouse and warms the air and objects within the greenhouse. The same glass slows the heat from escaping, resulting in much higher temperatures within the greenhouse than outside it.
Earth’s Atmospheric Gases
Nitrogen (N2)
Oxygen (O2)
Water (H2O)
Carbon Dioxide (CO2)
99%
Methane (CH4)
1%
Non- Greenhouse
Gase...
