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global warming

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IS GLOBAL WARMING CAUSED BY MAN?

Introduction

In this case study I will be investigating if man has caused global warming or if it is natural and what global warming is.

image00.jpg

http://www.rainforestlive.org.uk/media/Images/ACFED41.jpg

The picture above shows the sun warming up the earth and the heat trying to escape this reagents global warming. The heat is being trapped by greenhouse gases such as carbon dioxide. If there is more carbon dioxide in the atmosphere then the earth gets warmer.

Human causes

Many people say man is causing global warming with the biggest cause being pollutants. Burning fossil fuels is one thing that causes pollution when they are burned they give off green house gasses (co2). Another man-made cause for global warming is world population the more people on the planet the more food that needs to be produced. Most countries import food from other countries like the u.k import bananas like Jamaica which mean we have to transport them by plane or boat which both give out pollutants.

Since CO2 contributes to global warming, the increase in population makes the problem worse because we breathe out CO2. Also, the trees that convert our CO2 to oxygen are being demolished because we're using the land that we cut the trees down from as property for our homes and buildings. We are not replacing the trees (an important part of our eco system), so we are constantly taking advantage of our natural resources and giving nothing back in return.image01.jpg

http://library.thinkquest.org/J003411/causes.htm

image02.png

http://zfacts.com/metaPage/lib/zFacts-CO2-Temp.gif

Natural causes

On the other hand climate change could be natural a reason for this is a release of methane gas from arctic tundra and wetlands and methane is a green house gas. Some scientists believe that global warming has happened in the past and just happening again

During the last 2 billion years the Earth's climate has alternated                         between a frigid "Ice House", like today's world, and a steaming "Hot House", like the        world of the dinosaurs.

One natural cause is a release of methane gas from arctic tundra and wetlands. Methane is a greenhouse gas. A greenhouse gas is a gas that traps heat in the earth's atmosphere. Another natural cause is that the earth goes through a cycle of climate change. This climate change usually lasts about 40,000 years.

http://library.thinkquest.org/J003411/causes.htm

reference from the sun

31,000 scientists reject 'global warming' agenda

More than 31,000 scientists across the U.S. – including more than 9,000 Ph.D.s in fields such as atmospheric science, climatology, Earth science, environment and dozens of other specialties – have signed a petition rejecting "global warming," the assumption that the human production of greenhouse gases is damaging Earth's climate.

"There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate," the petition states. "Moreover, there is substantial scientific evidence that increases in atmospheric carbon dioxide produce many beneficial effects upon the natural plant and animal environments of the Earth."

The Petition Project actually was launched nearly 10 years ago, when the first few thousand signatures were assembled. Then, between 1999 and 2007, the list of signatures grew gradually without any special effort or campaign.
Gordon, give back the green taxes you've robbed us of.

http://www.thesun.co.uk/sol/homepage/

This chart shows how global climate has changed through time.

image03.jpg

http://www.scotese.com/climate.htm

In conclusion I think that global warming is natural and man are just making it worse and in many years to come the earth will repeat its self and freeze over and in even more years to come scientists will think that global warming  will be a very big thing and we all will die if we don’t change.

This student written piece of work is one of many that can be found in our GCSE Northern Ireland 1965-85 section.

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