I do not know whether climate change is happening. Well, of course it happens all the time, let me be precise. I do not know whether human activity is causing climate change that will create a crisis. Maybe yes maybe no. I did generally believe it, until the link between saturated fat and heart disease was debunked. That is totally unrelated in a way. The reason it affected my views on climate change is that my faith in scientific consensus was reduced. We can't understand how saturated fat affects our bodies with hundreds of thousands of researchers, doctors and others able to put hundreds of thousands of patients through measurements or different medicines and treatments, but with a tiny sliver of the expertise and research and only one "patient" that is far beyond our scale with factors we can't control and in some cases can only guess, we understand the past present and future of the earth's climate? The earth is 4000 miles wide and the deepest any human has gone into it is 8 miles (0.002%). What is 9 miles below you right now? We think we know based on theories and indirect measurements but nobody has seen it with their own eyes. It is not possible for climate scientists to change any factors at a speed that supports research. For example, researchers cannot raise or lower solar output or volcanic activity or cloud cover or ocean currents to isolate and test specific factors, except via computer models, which can be garbage in garbage out. There are human cadavers in every medical school. A researcher can look at an artery sample or put a camera probe into a patient's heart or record the effect a drug has on the patient or analyze outcomes over time of 1000 people who change diet vs 1000 who do not change diet. And we know more about the earth than we know about the human body? And how come every time data seems to get in the way, a "truth squad" of scientists rushes to say the problem is real despite the new data? I expect that from bloggers and activists, but wouldn't serious scientists want to take time to analyze first? Why is there so much spin in this from both sides?