That ignores the entire body of climate researches over many decades and probably millenia of person-years of research, ice cores, glacial/polar ice cap melt, e

That ignores the entire body of climate researches over many decades and probably millenia of person-years of research, ice cores, glacial/polar ice cap melt, etc. It seems like a valid point, but it really isn't. edit: it really isn't. We know the current warming is without precedent in rate, and has an upper limit around the PETM (about 50 Ma). It's like someone who had never seen a car before presuming it was powered by ghosts. It maybe reasonable within their frame of reference, but it is their frame of reference that is flawed in an objective context.