global warming

Global Warming and  the Greenhouse Effect

Contents of Entire Course

Are Greenhouse gasses responsible for changing the Earth's temperature?
Climate Variations
Consequences of Greenhouse Warming

adapted to HTML from lecture notes of Prof. Stephen A. Nelson Tulane University   

The Big Question:
We know that we are adding greenhouse gases to the atmosphere.
The question is, are these gases responsible for changing the Earth's temperature?


Are Greenhouse gasses responsible for changing the Earth's temperature?

 
Greenhouse Gases
Gas and Effects 
Relative Percentage 
      CO2
    • Burning of Fossil Fuels 
    • Deforestation 
60 % 
      Methane (CH4)
    • Coal Mines 
    • Termites 
    • Wetlands (Beavers?) 
    • Rice Patties 
    • Cattle 
    • Subpolar Soil and Wetlands (Methane Hydrate) 
15 % 
      CFC's
    • Refrigeration 
    • Fire Extinguishers (halons) 
    • Industrial Solvents 
    • Spray Cans 
12 % 
      Near-Surface Ozone
    • Unburned hydrocarbons from internal combustion engines reacting with sunlight 
8% 
      N2O
    • Artificial Fertilizers 
    • Disturbance of Soil 
    • Polluted Rivers and Estuaries 
    • Automobile exhaust 
    • Nylon Production. 
>5 %