1. There is not a single piece of observed, measured evidence which supports the AGW hypothesis over natural variability. 2. There is not a single piece of observed, measured evidence which establishes a coherent link between the absorption of infrared radiation by a gas and warming in the atmosphere. 3. The hypothesized warming due to mankind's burins of hydrocarbon fuels, which is the foundation of the anthropogenic global warming hypothesis has never been empirically measured, quantified, and then attributed to so called green house gasses. I have been asking for just a single piece of observed, measured evidence which supports the claims of climate alarmists for decades now and have never received the first piece. I see alarmists claiming that such evidence exists all the time...sometimes they even post what passes for evidence in their minds like THIS. There is certainly observed, and measured data there, but none of it supports the AGW hypothesis over natural variability, and none of it even begins to establish a coherent relationship between the absorption of infrared radiation by a gas and warming in the atmosphere...those things are certainly assumed in the example linked to, but there certainly is no evidence to support the assumption. And there is no paper there in which the hypothesized warming due to our production of CO2 has been empirically measured, quantified, and then attributed to so called greenhouse gasses. Again, it is assumed, but assumptions based on lose correlation over a very short period of geological time are less than worthless in any scientific examination of an entity as large, variable, and chaotic as the global climate. So there you go...I have stuck my chin out...I have made 3 very deliberate, and concise statements regarding the state of climate science and the evidence that mankind is having an effect on the global climate. It is the complete absence of evidence challenging the 3 statements above that explain why I am a skeptic. Prove me wrong. Don't tell me about the evidence that exists......don't tell me about the evidence you might believe you have produced...Step up to the plate and produce the evidence that I have quite clearly declared does not exist... And when you can't, ask yourself why it is that you believe what you do regarding man made climate change.