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There is no backscattering.  Energy spontaneously moves from warm to cool.  It will not move from cool to warm so the backscattering effect you descirbe is fictitious.  It is like trying to claim that when you spray water out of a hose that some of it will go back into the hose thus giving you more water pressure.

 


 

CO2 only alters the temperature of the earth to the extent that CO2 in the atmosphere has an effect on the atmospheric pressure.  See the ideal gas laws regarding pressure and temperature.

 


 

The difference between the sahara and the rain forest is due to H2O, not CO2 or any other so called greenhouse gas.

 


 

There is no backscattering just as there is no backconduction or back convection.  Energy spontaneously moves from warm to cool.  Backscatttering is a fiction.  The IR may not emit from a CO2 molecule in precisely the opposite direction as it was moving when it was absorbed, but it emits in a direction towards cool.  Again, it can no more emit in a direction towards a warmer object than water can bounce off your car and go back into your hose giving you more water pressure, or than a golf ball can go off in some other direction that that which it was struck.  Energy moves from warm to cool because it has to.  It doesn't attempt to turn around and go back upstream.

 


 

Again, there is no backscattering.  There is scattering, but backscattering is a fiction.  Energy moves spontaneously from warm to cool.  When the energy is emitted from the CO2 molecule, it doesn't have the option to move back towards the warmer object from which it was originally radiated.  It moves from warm to cool because it has no other option.  It spontaneously radiates towards a cooler temperature.  There is no movenemt of energy from cool to warm so there is no possiblity of backscattering radiation any more than there is the possibility of back convection or back conduction.  Backscattering is a made up bit of unphysical malarky and there is not a single observable repeatable experiment to prove that it can happen without having done some work to make it happen.


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