More on Global Warming

Researchers find new causes.

www.msnbc.com...

" Previously, scientists widely assumed it was only with the onset of the factory age that human activity had any significant effect on the global climate. The prehistoric changes in carbon dioxide and methane levels have been noted before but were attributed to natural causes, Ruddiman said."


There was a thread about this not too long ago, and I made the point that our habits with cars, smog, and factories might not be completely to blame, that there could be other factors which we may not know about. Don't misunderstand me, I don't completely discount what folks are saying about smog being the culprit, but it seems to me that as soon as we found a single cause (smog) we rallied against it without looking for other possible causes.