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I withs the title was better, but I wasn't sure what to change it to.

It's mostly just debunking hyperbole around climate change.

This Shellenberg guy has a really weird schtick. I can't figure out if he's just insane or a member of some strange cult.

A few juxtapositions of this current column against his previous columns:

He doesn't want people to say that climate change will make Koalas extinct, but he himself thinks wind turbines will make several species extinct.

He thinks it makes sense to burn coal in India because it's cheap, but he attacks renewables, which are cheaper than running existing coal in some regions, because they will "lock in" fossil fuel usage which is apparently a bad thing when they do it.

He relies on the IPCC as the last word on whether climate change will have catastrophic impacts, but also rails against it for it's anti-nuclear bias. Are we allowed to question the IPCC or not?

He wants everyone to be reasonable and sensible but think most environmentalist are csecret communists who want to intionally made people poorer?

Apart from your final sentence, which is just weird, I don't see these as contradictions. Seldom does anyone agree 100% with someone else (mathematicians might be an exception), so one could reasonably consider the IPCC to be reliable on some issues and not on others. But that's probably not even what's' happening; the author might (for all I know) think the IPCC is too far on the side of exaggerating the climate change problem (and ignoring the nuclear solution), but still use them as evidence that the climate feature is not as bad as some claim. And the idea that coal is a good idea in India (a relatively impoverished country) and bad in "some regions" (presumably wealthy countries, you don't say) seems entire non-contradictory to me.

"Insane" or "strange cult"--oh, stuff and nonsense. You need to come back to reality.

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From the article: "First, no credible scientific body has ever said climate change threatens the collapse of civilization much less the extinction of the human species."

They say millions in the US will be displaced due to climate change in the coming decades. And yet, here we are in CA already displacing millions just from this self inflicted housing crisis.

That's a leitmotif in the article, and I think it's a good cautionary note. We need to tackle climate change, but we can't stop work on other problems, mistakenly thinking they'll be solved automatically by fixing climate change.
It’s about time people start being more sensible on this topic. This was becoming bordeline stupid, with pretty much everything « caused by climate change ». i wonder what the next victim of media insanity will be..
There is a lot of money to be made going around reassuring people that the greatest existential threat of our time is no big deal.

When the hundreds of millions of refugees flood across borders driving governments to fascism, and those fascist governments do what they do and trigger global thermonuclear war, these same individuals will insist none of it was their, or the fascists', fault. If money still means anything they will be well-paid for that, too.

There is a lot of money to be made on both sides of the issue.
Meaning, a lot of money to be saved by stopping petroleum subsidies and retiring oil- and coal-fired generators in favor of renewables. The massive savings on medical costs from reduced pollution will ramp up slowly.

But there is way, way more money immediately available from the people still getting the petroleum and coal subsidies.

There are no such subsidies; the subsidies are on the side of solar, wind, etc.

There was a claim awhile back that fossil fuels were somehow subsidized in the sense of "externals" (e.g. government pays their militaries to protect foreign countries that produce petroleum). I find the notion ridiculous, but even if you don't, no petroleum or coal company can cash in on that kind of subsidy.

They cash in on it every single day. The difference between what other countries pay for fuel and what the US pays is all subsidy. If collected at the pump, instead, people would have moved to more cost-effective fuels long since.
When you start going down the road of affected things, and then affected-affected things, and then affected-affected-affected things, you leave your case more vulnerable to alternative explanations (and thus solutions) with each step along the way.

Climate change -> population migration -> fascism -> nuclear war is quite a severe set of steps, and if this is truly the scenario we're worried about, then climate change is probably the most difficult step to correct. We'd likely have a much easier time trying to control migration or fascism or nuclear war. And there's a decent chance something will naturally interfere with these set of steps such that it doesn't occur.

Additionally, it seems to me that nuclear war can derive from a number of different sequences, and climate change is probably not the most immediate one.

I.e., nothing causes anything, doing anything has no effect. The song is old.
Or rather, history is not a simple straight line for you to trace out and predict as your political needs require.

We can play the same game with other sequences as well, and its still not that convincing

Video games -> de-sympathizing -> murderers -> high crime rate

Poor -> Uneducated -> Republican -> Trump

religious -> muslim -> jihadi

religious -> anti-science -> ludite -> Unabomber(s)

DnD -> Anti-Christian -> Anti-good -> satanists

Just because you drew a path doesn't make it convincing.

I.e., Something could cause something, which could cause other things, so they definitely do cause it, so stopping something stops everything. The song is old.

That's quite the leap. They were saying to attack a different part of the chain, not that the chain doesn't exist.
but still ... i would rather live in a world with less pollution ...
The tipping points are real, cataclysmic and not mentioned here. Read about the clathrate gun and the methane coming out of the tundra, never mind the huge fires in the boreal forests this year. The IPCC estimates are famously conservative and the trend figures all indicate the most aggressive scenarios or worse are likely. Anyone who suggests the world will end in 20 years is wrong, but the impacts will be massive on longer timescales. Minimizing the risks in this way is so deeply frightening.