Since the pro choice thread careened wildly off topic toward another forum favorite, there seems to be some startling new evidence that human activity has no effect on the planet, let alone the climate. I'd like to see this evidence. Most of us are familiar with the carbon exchange cycle: And that human-created pollution continues to affect it. So how, I wonder, is climate not affected by ecosystems changed by our input? The argument made by climate change deniers seems very similar to the arguments given by evolution deniers: <Evolution can be divided into Micro and Macro evolution. Micro evolution is observable, Macro evolution is not.> Most people with a little bit of knowledge on the topic recognize this as a false dilemma. Not only does no one in the field divide the theory of evolution (process of how life changes over generations) into Micro vs. Macro, the claim that part of the theory isn't observable is patently false. And yet, simply by creating a diversion, creationists are able to distract the lay person into believing there's a problem with the theory of evolution as a whole. The same thing seems to be going on with the perception of climate change: Most people will admit that changes in the climate are taking place, simply but deny that it's human-created.