Global Warming and Its Definitions

1. Global warming is the increase in the average measured temperature of the Earth's near-surface air and oceans since the mid-twentieth century, and its projected continuation.
http://en.wikipedia.org/wiki/Global_warming

2. An overall increase in world temperatures which may be caused by additional heat being trapped by greenhouse gases.
www.srh.noaa.gov/jetstream//append/glossary_g.htm

3. an increase of the earth's temperature by a few degrees resulting in an increase in the volume of water which contributes to sea-level rise.
www.nwrc.usgs.gov/fringe/glossary.html

4. The progressive gradual rise of the Earth's average surface temperature thought to be caused in part by increased concentrations of GHGs in the atmosphere.
www.ecoagriculture.org/page.php

6. Global warming is the gradual increase in global temperatures caused by the emission of gases that trap the sun's heat in the Earth's atmosphere.
www.planningforpeople.ca/terms_and_definitions.asp

7. The earth has warmed up by about 0.6ºC in the last 100 years. During this period, human emissions of greenhouse gases have increased, largely as a result of the burning of fossil fuels and deforestation.
www.climatechangenorth.ca/H1_Glossary.html

8. An increase in the near surface temperature of the Earth as a result of increased emissions of greenhouse gases, such as carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and ozone (also see greenhouse effect). www.ruralresidentialliving.com.au/introduction/glossary.html

9. A gradual warming of the Earth's atmosphere reportedly caused by the burning of fossil fuels and industrial pollutants.
www.wisconsinpublicservice.com/farm/terms.aspx

10. Certain Gasses such as carbon dioxide, methane, nitrous oxides and chlorofluorocarbons (CFC's) absorb reflected infra-red radiation and trap it within the earths atmosphere. This heat which would normally be dissipated into space increases the temperature of the earth.
www.ecifm.rdg.ac.uk/glossary.htm

11. The concern that a build-up of greenhouse gases in the atmosphere (beyond those levels required to sustain temperatures to support life on the planet) will result in catastrophic changes to the earth’s climate patterns.
www.americaspower.org/The-Facts/Glossary-of-Terms

12. Increased levels of gases such as carbon dioxide that trap heat in the earth's lower atmosphere potentially causing global warming
www.ifdn.com/teacher/glossary.htm