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John Lawrence Aspden's avatar

> The vast majority of people who believe in global warming have only one real piece of evidence: Climatologists believe in global warming.

And that is fairly strong evidence, even if we admit the possibility of politically motivated lying by large groups of scientists. After all, what would the scientists' motivation be here? The politics at least originally was downstream of the science rather than the other way round.

In addition to that I have the fact that when I was a boy, people were arguing on grounds of simple physics I could understand about whether Milankovich cycles would plunge us into a new ice age, or the greenhouse effect would keep us warm and indeed possibly too warm.

Both effects seem to be true as far as I can tell, indeed it seems that early forest clearance and the resulting rise in carbon dioxide in ancient times might have been what has caused this current interglacial to last so long, and it seems rather silly to not believe in the greenhouse effect, or that industrial emissions of carbon dioxide and a recorded rise in the amount in the atmosphere won't have strengthened the greenhouse effect as predicted.

What no-one's ever managed to convince me of is the idea that global warming is some sort of terrifying threat. It might even be a net positive. That's the interesting bit of the debate. And yes, there I can well believe that politics is silencing some dissenting academic voices.

Possibly even yours. Cost-benefit analysis is your domain. What do you think? What really are the consequences of the world getting a bit warmer? I think everyone would agree that a bit colder would be bad. Why would we assume current temperatures are optimal?

And if you did think it wasn't so bad, would you actually be happy to become one of the despised "science-deniers" in the enemy tribe? It's sure not a hill I'd be prepared to die on.

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Shoveltusker's avatar

"Believe in global warming". Gotta say, I hate seeing that phrase. Do you mean "believe in anthropogenic warming"? Maybe? Who knows? I can't tell. The language is imprecise.

I think most people believe that the globe is warming. But even climatologists do not all agree that the warming is anthropogenic. And there is no way to be sure, because you can't actually measure anthropogenic effects on the climate. You can make predictive models, but the models are not the real world.

We do not KNOW any of the following:

--that anthropogenic warming is happening

--that if it is happening, whether it is significant

--that if it is happening, whether the net effect is "bad" or "good"

--whether it is bad or good, whether spending trillions of dollars on mitigation will have any effect

Take it from an academic: lay people who are curious about any of this need to understand how financial and status incentives (and disincentives) affect the practice of scholarship and science. The effect is extremely large.

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