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xkcd : Earth Temperature Timeline
(imgs.xkcd.com)
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this post was submitted on 11 Oct 2023
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Because I can already hear the anti-man-made-climate-change crowd shrieking... how do we go about determining global temperatures thousands of years ago?
Edit: Stopped being lazy and googled it: https://gizmodo.com/how-do-scientists-know-what-the-temperature-was-thousan-1714597561
Very informative but you see, science doesn't convince the anti-science crowd, pretty much by definition.
Yup, but if I'm talking to someone who doesn't believe in man-made climate change and I show them the xkcd and answer their obvious follow-up question about how we know past temperature, and they STILL don't want to listen to me... well then I know I can never talk to that person again. :)
Too bad the anti-science crowd are our elected officials. ༎ຶ‿༎ຶ
https://skepticalscience.com/
Generally a good source for this use case. You can sort by popular arguments or arguments by type, and for many answers choose from different detail levels, sometimes even languages.
I didn't find your specific question in their catalogue of answers, but they have a blog post about that topic: https://skepticalscience.com/two-centuries-climate-science-3.html
There is also that group that says it will get warmer naturally, by whatever solar flare etc bullshit ever. So business as usual, can't change the course anyway so I will buy a second SUV
It's good to ask the question.
The problem is when they refuse to accept the answer.
Centuries of applied critical thinking.