http://weathersavvy.com/Q-Climate_Greenhouse_Gases.html
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Learning Targets:
 I can explain factors that cause the dynamic balance in the atmosphere to change.
 I can model and explain the relationships and energy flow existing in various Earth systems (atmosphere) http://4nutshells.com/wp-content/uploads/2010/10/Earths-atmosphere.jpg
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http://www.life-size-media.com/blog/wp-content/uploads/2012/06/cc-cartoon.jpg
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41. What GHG’s are naturally present in the atmosphere? water vapor, ozone, carbon dioxide, methane, and nitrous oxide
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Total Emissions in 2011 = 6,702
Million Metric Tons of CO
2 equivalent
Gases that trap heat in the atmosphere are called greenhouse
5 http://www.epa.gov/climatechange/ghgemissions/gases.html

U.S. Greenhouse Gas Emissions in 2011
Total Emissions in 2011 = 6,702
Million Metric Tons of CO
2 equivalent
* Land Use, Land-Use Change, and Forestry in the United States is a net sink and offsets approximately 14% of these greenhouse gas emissions.
All emission estimates from the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2011 http://www.epa.gov/climatechange/ghgemissions/sources.html
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Greenhouse gases trap heat and make the planet warmer.

42.Some GHG’s are synthetic chemicals that are emitted only as a result of human activity.
43. Anthropogenic means human .
http://www.bing.com/images/search?q=human+activities&qpvt=human+activities&FORM=IGRE#view=detail&id=00A0C4D001017BD15133D6856CC47313BA75FC61&selectedIndex=13
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Click on link to see slide show of 10 ten sources of greenhouse gases http://knowledge.allianz.com/environment/climate_change/?651/ten-sources-ofgreenhouse-gases-gallery
Click on link below to see GHG emissions for Hardin County http://ghgdata.epa.gov/ghgp/main.do
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http://www1.eere.energy.gov/femp/program/greenhousegases_basics.html
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http://yubanet.com/uploads/3/greenhousegases.jpg
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44. Complete the table below for these common
Greenhouse Gases, GHGs.
Carbon dioxide
Formula CO
2
Sources combustion of carbon-based fuels
- the decay of biomass
Natural Sources - volcanic eruptions ,
respiration of organic matter in natural ecosystems
- natural fires
Human sources
exchange of dissolved CO
2
(a) fossil fuel combustion with the oceans
(b) deforestation and land use changes (such as converting agricultural land or forests to urban development)
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http://www.arb.ca.gov/cc/inventory/inventory.htm
http://www.chemistryexplained.com/Di-Fa/Explosions.html
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http://www.inkcinct.com.au/web-pages/cartoons/past/2008/2008-404--greenhouse-gas-reduction-policy.gif
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Methane
Formula CH
4
Sources - anaerobic decay of organic material in landfills, wetlands, and rice fields
- enteric fermentation in the digestive tracts of ruminant animals such as cattle, goats, and sheep
- manure management
- wastewater treatment
- fossil fuel combustion
- leaks from natural gas transportation and distribution systems
- abandoned coal mines.
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http://www.treehugger.com/corporate-responsibility/waste-management-investing-us400-million-in-methaneto-electricity-projects.html
http://knowledge.allianz.com/environment/climate_change/?651/ten-sources-of-greenhouse-gases-gallery http:// www.arb.ca.gov/cc/inventory/data/data.htm
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Nitrous Oxide
Formula N
2
O
Sources - fertilizer use
- animal waste management
- fossil fuel combustion
- industrial activities.
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http://www.whatsyourimpact.eu.org/n2o-sources.php
http://www.arb.ca.gov/cc/inventory/1990level/1990level.htm
http://www.whatsyourimpact.eu.org/n2o-sources.php
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Hydrofluorocarbons (HFCs) and perfluorocarbons
(PFCs) are synthetic chemicals that are used in a variety of industrial production processes
Sources
- semiconductor manufacturing
-PFCs - by-product of aluminum smelting
- substitutes for ozone-depleting chlorofluorocarbons
(CFCs) in refrigeration and foam-blowing for insulation
CFCs are being phased out under the 1987 Montreal
Protocol on Substances that Deplete the Ozone Layer.
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http://www.unep.org/ccac/ShortLivedClimatePollutants/tabid/101650/Default.aspx
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Earth temporarily traps infrared radiation more efficiently, so the natural radiative balance is disturbed until its surface temperature rises to restore equilibrium between incoming and outgoing radiation.
http://gov.cbia.com/images/sized/images/blog/NIA-EnviroLand-21-572x368.jpg
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.
Importance of human-produced greenhouse gases
Courtesy Marian Koshland Science Museum of the National Academy of Sciences http://www.koshland-science-museum.org
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