- Dec 18, 2013
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so there was global warming back millions of years ago. Still so what? you can't prove human involvement in any global warming. And again, for the umpteenth hundredth time, the earth has been warming since over 800000 years ago. doh!!!!!I thought you were following the thread. High CO2 levels lead to the phenomenon of global warming. If we have consistently high CO2 levels regardless of what is causing it then we have a problem. Did you read the OP?so what to your bolded print. Who cares? The fact is the atmosphere was as high as 4k, 3.6k higher than today. And.....not caused by humans. And if not caused by humans, by what? Can you answer that?I bolded the point. What are you confused about?but they have been higher than today to 4k 3.6k higher and humans weren't here. You know that right? So I don't get your point or argument. You can't prove human anything does anything.This one.what problem are you referring to?
The Last Time CO2 Was This High Humans Didn t Exist Climate Central
"The most direct evidence comes from tiny bubbles of ancient air trapped in the vast ice sheets of Antarctica. By drilling for ice cores and analyzing the air bubbles, scientists have found that, at no point during at least the past 800,000 years have atmospheric CO2 levels been as high as they are now."
BTW, I believe I read it has been as high as 7k.