Invisible man? I'm not playing both sides. I'm illustrating the fact that most people refuse to admit that they know very little, and use "science" to hide their ignorance. In this case, is the Earth warming, at an accelerated rate? Yes. Is it because of an increase in "greenhouse gases"? Maybe, but the sun is also expanding and heating up, so it certainly isn't the sole cause. Is human pollution contributing? Again, maybe, but causation and correlation are not the same thing. Can we prove question 2 and 3? No, they are hypotheses. And on cue, just like I said, you called me a denier, as if that somehow makes you right in making an assertion without evidence.