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water vapor, carbon dioxide, 

methane, ozone, and nitrous oxide are referred to as

Global warming describes an increase 
in the average temperature of the Earth's atmosphere and oceans. 
The terms global warming or anthropogenic global warming 
are also used to describe the theory that increasing temperatures 
are the result of a strengthening greenhouse effect 
caused primarily by man-made increases in carbon dioxide 
and other greenhouse gases. 

The natural greenhouse effect 
keeps the Earth 30C warmer than it otherwise would be; 
adding carbon dioxide to an atmosphere, 
with no other changes, 
will tend to make a planet's surface warmer; 
the question is, by how much?

earth's radiation budget
water 

vapor imagery Book Review: The Breakdown of Climate review data


Greenhouse gases 

(GHG) are gaseous components 
of the atmosphere that contribute to the greenhouse effect. 
The major natural greenhouse gases are water vapor, 
which causes about 36-70% of the greenhouse effect on Earth 
(not including clouds); carbon dioxide, 
which causes between 9-26%; and ozone, 
which causes between 3-7% 
(note: the influences of the various gases are not additive)






Human activity raises levels of greenhouse gases 
primarily by releasing carbon dioxide.

The concentrations of several greenhouse gases have 
increased over time due to human activities, such as:
   * burning of fossil fuels and deforestation 
leading to higher carbon dioxide concentrations,
    * livestock and paddy rice farming, 
land use and wetland changes, 
pipeline losses, and landfill emissions 
leading to higher methane concentrations,
    * the use of CFCs in foam-blowing agents,
aerosol propellants, refrigeration systems, air-conditioning. 
Solvents for cleaning electronic microcircuits,
carbon tetrachloride, methyl chloroform.
The use of Halons in fire suppression systems 
and various manufacturing processes.
 
Carbon dioxide is the subject of the proposed Kyoto Protocol. 
Methane and nitrous oxide are also taken into account 
in the international agreements, 
Ozone Depletion is the subject of the Montreal Protocol.




Kyoto Protocol

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Global association of governments facilitating cooperation in international law, security, economic development, and social equity.

United Nations System http://www.unsystem.org/
Official web directory of the United Nations bureaucracy.

UNDCP: Links to the United Nations http://www.undcp.org/unlinks.html
Comprehensive listing of UN agencies, Model UN organizations, and web sites on drug policy.

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Caucus organization helps developing states pursue common goals and develop leverage in United Nations deliberations.

Permanent Missions to the United Nations http://www.un.int/
Member listing, website directory and search engine, and links to UN resources.




United Nations Statistics Division http://www.un.org/Depts/unsd/
The Statistics Division is responsible for the collection and dissemination of economic and social statistics and the provision of assistance to Member States in improving their statistical capabilities and in adopting international statistics guidelines and standards.



United Nations: The First Fifty Years
by Stanley Meisler Basic Facts About the United Nations 2000 (Basic Facts About the United Nations) An Insider's Guide to the UN by Linda Fasulo he United Nations : International Organization and World Politics by Lawrence Ziring, Robert E. Riggs, Jack A. Plano

The United Nations Of Future Music Vol. 1 Office for Outer Space Affairs: University of Vienna United Nations -  VHS - Air Mail Philatelic The United Nations Of Future Music Vol. 2


United Nations Flag

Global Agenda, A: Issues before the 59th General Assembly of the United Nations,
2004-2005 Edition by United Nations Association/USA


The United Nations at Work

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Our Magnificent Wilderness: Forty of the World's Most Beautiful Places Selected by UNESCO</a><br><br>
<img src= United Nations for Beginners

Unesco Concert

Peacekeeping and the UN

United Nations Flag Patch

UN World Heritage and UN Scientific Board and Geoscience Program



International Union of Geological Sciences

The United Nations : International Organization and World Politics by Lawrence Ziring, Robert E. Riggs, Jack A. Plano  UNICEF


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