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Politics : GOPwinger Lies/Distortions/Omissions/Perversions of Truth -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (101735)	7/3/2007 11:20:08 PM
From: J_F_Shepard	Read Replies (1) \| Respond to of 173976

re:"Yes, CO2 is a greenhouse gas. Not a primary one though. The impact of raising it is unclear." Which one is more influential that CO2? Let me try to explain it to you based on scientific data. The following curve from the DOE shows how CO2 concentrations in the atmosphere have changed over the past 200-300 years. Data is available for the last 60,000,000 years if you're interested. eia.doe.gov A primary source of heat loss from the planet is through radiation. Hence, the thermal conductivity of the atmosphere largely controls the amount of radiation. All gases have different thermal conductivities just as all other materials do. For example, silver has the highest thermal conductivity of all metals. With respect to gases, CO2 has only about 64% of the thermal conductivity of air. It is easy to see therefore, that increasing the concentration of CO2 in the atmosphere will reduce the thermal conductivity of the atmosphere. If we ran an experiment with a box of air that is exposed to a sunlamp cycled to simulate an earth day and then measured the temperature as a function of CO2 concentration, what do you think would happen? Answer....the temperature would rise. 7.9 billion metric tons of CO2 were produced in 2005. About 500 billion metric tons have been produced by the industrial revolution over the last 150 years..