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Originally Posted by pinkie
But if this is true, how did the concentrations of atmospheric
carbon dioxide reach 400 parts per million (ppm) 420, 000 years ago then?  |
I can't answer your question because I don't have the time to source out and read all the material I'd need to make an educated response.
I guess the best I can say right now is "I don't know"
I just don't get how people can see the release of human made CFC's, CO, and other noxious chemicals released from factories into the atmosphere as having no effect.