OPINION:
Will someone show me when, in the entire history of Earth, carbon dioxide definitively caused global warming? No, because there has never been such a time.
In charts I have studied, there is no relationship between carbon dioxide and temperatures. One glaring example is in 4.5 billion years ago, during one of the extinction periods when 90% of life on the planet was destroyed. At that time, the entirety of Earth was covered with ice and the carbon dioxide level was 3,000 parts per million.
Our current carbon dioxide level is about 500 PPM. If carbon dioxide caused global warming, 4.5 million years ago Earth would have been a fireball instead of a snowball.
I am not a scientist, but in studying facts you only need to apply common sense.
JOHN PROCIDA
Flushing, New York
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