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Amrit Grewal

on 5 November 2013

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Transcript of GLOBAL WARMING

What is Global Warming?
A gradual increase in the overall temperature of the Earth's atmosphere because of an increase in the primary green house gas of carbon dioxide.
An increase in atmospheric carbon dioxide caused by human activities will increase the greenhouse effect, significantly raising global temperatures which will have disastrous consequences.
The scientific community that does not believe that the Global Warming hypothesis is being supported through valid facts and information. Opponents believe the Global Warming hypothesis is incorrect.
Al Gore
Former US Vice-President. He has been creating awareness for global warming.
An Inconvenient Truth
Documentary Trailer
A Documentary hosted by Al Gore highlighting the effects of pollution (carbon dioxide) on Global Warming
The scientific community that believes the Global Warming hypothesis is being proven true through data collected about the Earth's rising temperature and its effects on the Earth.
Evidence Supporting Hypothesis:
Increase in Atmospheric Carbon Dioxide Levels
Current carbon dioxide levels are far above the 300 ppm average of the past 400,000 years.
Projected Global Warming if Carbon Dioxide levels exceed the 400 ppm of today:
Glacial Retreat
Warming of Lakes and Oceans
Muir Glacier, Alaska
63 years later
August 31, 1941
August 31, 2004
June 2,1994
July 8, 2013
Elephant Butte Reservoir
New Mexico
Rising Water Levels as Ice Melts
August 13, 1992
Sept. 21, 2003
Sept. 13, 2012
Lake Ayakkum
Extreme Events
Aug. 1, 2012
Sept. 2, 2012
Hurricane Isaac
James Delingpole
A writer for The Times, The Daily Telegraph, and The Spectator who claims that Global Warming is a false phenomenon because it is political.
A book written by James Delingpole that describes the environmental movement and claims that Global Warming is a political issue, not an environmental issue.
Evidence Disputing Hypothesis:
Scientists do not believe that our actions threaten the Earth's climate:
Over 17,000 scientists have signed a petition at the Oregan Institute of Science and Medicine stating that carbon dioxide and other greenhouse gas emissions are not and will not cause Global Warming.
The most reliable sources of temperature data show no Global Warming Trend
Satellite readings of temperature in the lower troposphere (an area that scientists predict would accurately reflect warming) shows no warming in the past 23 years. Only land-based temperature readings have shown a warming trend. These land based readings can be innacurate because of heat contamination from nearby urban development.
Global Climate Computer Models are inaccurate and fail to predict future climate changes accurately
Computer models require the use of "flux adjustments" for the programs to be able to predict future events. The flux adjustments can be 25 times larger than the effect of doubling carbon dioxide concentrations. This is a form of cheating by these programers and produces inaccurate models.
The IPCC did not prove our actions are causing Global Warming
The UN organization, the Intergovernmental Panel on Climate Change (IPCC), stated in its 2001 report that there are large errors when predicting weather forecasts because climate processes are complex and difficult to predict.
My Opinion
I believe that the scientific data on carbon dioxide emissions supports the claim that the Earth is warming. Although many scientists have written a petition stating that carbon dioxide does not affect Global Warming, I believe that it does affect Global Warming since our current level of carbon dioxide in the atmosphere is the highest it has been in 400,000 years. Also, I believe our activities are adding carbon dioxide to the atmosphere more than humans have ever in the history of the world.
1. Global Climate Graph http://climate.nasa.gov/evidence
2. Nasa Climate Flux website http://climate.nasa.gov/state_of_flux
3. Pictures from Google Images
4. Videos from YouTube
By: Amrit Grewal
Full transcript