The Danish scientist Henrik Svensmark has been scorn for several years now because of his alternative explanation of how earths temperature varies. His theory states this: High solar activity is a sign of a strong magnetic field from the sun -> Strong magnetic field from the sun will decrease the amount of cosmic rays/particles which enters earths atmosphere -> As these particles are "grains" for condensation of low clouds, a reduction of the incoming particles will result in less low altitude cloud formation (Low clouds are an important factor in reflecting suns incoming energy to earth, that is, increasing earths albedo.) -> Earths temperature rise This was the short explanation. The complete text is called "Cosmoclimatology: a new theory emerges" [A&G February 2007 - Vol.48]. At the moment it seems like the IPCC has managed to quiet down any alternative explanations to CO2 driven Global Warming. There must be a people scattered throughout the world who are members on this forum, a lot of them also attending universities/colleges. So what I was wondering about is: Is there a general acceptance for CO2 as the cause for GW? Are Henrik Svensmarks theories well known?