The EM field generated by the earth emits along every possible vector along the surface of the earth.
But only when photons of the same wavelengths meet would there be any interference, a very unlikely event.
Not true again konradv. You keep demonstrating that you don't have a grasp of even the basics. Go back to your single strand of copper wire. Attach a car battery to one end (DC) and a wall socket to the other (AC). Clearly the EM fields generated by the two sources are of different frequencies (read wavelengths) but you still can't have electricity flowing in both directions along the single wire. It just won't happen.
The reason radio stations don't completely delete each other is more a matter of the point of, and direction of propagation in any geographical area. Clearly, you either didn't look at the link I provided, or you did, but didn't understand any of it.
Also, since the sun is much brighter than earth and you say EM fields interfere with the kind of emissions I assume to be warming the earth, how is it we can see the earth from the moon?
EM vectors, konradv move in straight lines and as such, only vectors that are in opposition along a straight line from both sources are subtracted.
You say it isn't possible for a photon re-emitted from CO2 to do it.
When did I ever say such a thing? I said that one CO2 molecule can't absorb the emission spectra of another CO2 molecule.
How does a photon reflected off the earth fight all that EM coming from the sun. According to your theory we shouldn't be able to see the moon and planets at all!!!
Again, EM vectors move in straight lines and cancel out only along those straight lines. The spatial relationship of the earth to its atmosphere is not like the relationship of the earth to the sun or the earth, moon and sun. I wish there were easy words with which to explain this to you konradv. I suppose I could point you in the direction of some reference to Poynting Vectors, but I doubt that it would help matters. Directing you to more complicated mathematics will not make it easier to understand. It is a fact, however, that whenever you examine the movement of electromagnetic energy (read radiation), all movement is determined and can be predicted by field vector calculus which is tied directly to the law of conservation of energy.