I suggest laying the axe to the root: Humans have never actually measured the temperature of planet Earth.
Scientist Richard Courtney points out that there is no agreed definition of a global temperature.
Temperature measurements at fixed locations cannot predict the Earth as a whole.
A new sample, newly randomized, would have to be selected randomly each and every time someone measures Earth's temperature.
Using a handy statistics calculator, we might have to randomly select 18,095 locations - different each time - to get a 0.85% margin of error at a confidence level of 98%. That means that if the global temperature is in the vicinity of 59 degrees Fahrenheit, the margin of error would be half a degree.
The Earth's overall temperature could be sampled, say, once a year.
If we don't have a single temperature reading for the entire planet for today, how can we say if the planet is getting warmer or cooler or not changing at all? We cannot talk about the temperature in, say, Geneva or London or New York City only.
https://www.americanthinker.com/articles/2021/05/do_we_know_earths_global_temperature.html
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