If the earth's warming and cooling is not caused by man, and it's not, then what is causing it.
How about the sun's energy output?
By looking at tree rings, the sun's energy output can be evaluated back as far as 10,000 years.
The ups and downs of the climate of the last 1,000 years, even the 20th century can be evaluated.
"When the sun's magnetism is strong, the sun's energy output is higher and the Earth is warmer. We see that as a fact. We measured that carefully over the last 20 years with satellites from the Earth, and we measured it indirectly going back 400 years, 1,000 years, and 10,000 years."
And, all this time, we little people thought we had such global influence. In the end, it's the sun.
How novel an idea!
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