[ExI] Could a giant sunshade in space solve global warming?

[Keith Henson]

On Thu, Oct 29, 2026 at 12:00 PM spike jones via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

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> *From:* extropy-chat <extropy-chat-bounces at lists.extropy.org> *On Behalf
> Of *John Clark via extropy-chat
> *Subject:* [ExI] Could a giant sunshade in space solve global warming?
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> *>…The following article was in the October 28 issue of the journal
> Nature: *
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> *Could a giant sunshade in space solve global warming? Scientists are
> taking the idea seriously*
> <https://www.nature.com/articles/d41586-026-03415-2>
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> *John K Clark*
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> *If any company or government did something like this, they become liable
> for extreme weather events.*
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That's a really stupid reason, but we live in stupid times. Incidentally,
the first analysis of this was by Robert Kennedy III and another guy and
was published in the JBIS around 15 years ago. I think you can find it with
"Dyson Dot" as a search term. The number that sticks in my mind is 200
million tons of metal. Mining an asteroid might be practical or possibly
mining the moon. Rockets are not in this game. The exhaust would kill the
ozone layer many times over.

Keith


*Conclusion: it cannot happen.*
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> *spike*
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