This lesson from economics is essentially what the "lukewarmists" bring to discussions about climate change. They concede that all else equal, more carbon dioxide will cause the climate to warm. But, they say that warming is likely to be mild unless you use a model which assumes large positive feedback effects. Because climate scientists, like the macroeconomists, can’t run experiments where they test one variable at a time, predictions of feedback effects involve a lot of theory and guesswork. I do not denigrate theory and guesswork; they are a vital part of advancing the sum of human knowledge. But when you’re relying on theory and guesswork, you always want to leave plenty of room for the possibility that your model's output is (how shall I put this?) … wrong.
Naturally, proponents of climate-change models have welcomed the lukewarmists' constructive input by carefully considering their points and by advancing counterarguments firmly couched in the scientific method.
No, of course I’m just kidding. The reaction to these mild assertions is often to brand the lukewarmists “deniers†and treat them as if what they were saying was morally and logically equivalent to suggesting that the Holocaust never happened.
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The arguments about global warming too often sound more like theology than science. Oh, the word “science†gets thrown around a great deal, but it's cited as a sacred authority, not a fallible process that staggers only awkwardly and unevenly toward the truth, with frequent lurches in the wrong direction. I cannot count the number of times someone has told me that they believe in “the science,†as if that were the name of some omniscient god who had delivered us final answers written in stone. For those people, there can be only two categories in the debate: believers and unbelievers. Apostles and heretics.
This is, of course, not how science works, and people who treat it this way are not showing their scientific bona fides; they are violating the very thing in which they profess such deep belief. One does not believe in “science†as an answer; science is a way of asking questions. At any given time, that method produces a lot of ideas, some of which are correct, and many of which are false, in part or in whole.
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so, why not take care of it and give back at the same time? Forget about what science or those other people / organizations with hidden agendas - just use plain ole logic and you'll come to the same conclusion 
