Quote:
Originally Posted by Arctic Fox
Just to clarify the "800,000 years ago" issue:
The current atmospheric level of carbon dioxide is 400 parts per million, and climbing.
The furthest back that scientists have currently gone, using ice cores, is 800,000 years, at which time the level was 300 ppm.
So today's level is not only the highest in 800,000 years, but is also considerably higher than it was 800,000 years ago.
In fact, it is believed that the last time the level was at 400 ppm was more than three million years ago.
May not change your thinking, but thought you should know.
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This doesn't really change my opinion.
Ok. Why was CO2 at such 'high' levels 3 million years ago and man wasn't even around to "cause" it?
I know. The Earth caused it.