[Mind-numbed Robot]

Greenhouse gas theory is settled and CO2 increases will cause some slight warming. Manmade CO2 releases cause most of the observed atmospheric CO2 increases.

Then why was the CO2 level 10-15 times higher during the Little Ice Age? No men and no warming. Go tho the link I left above for some good info.

[palmer]

CO2 wasn’t higher in the Little Ice Age and certainly not 10-15 times higher. There were prior periods in earth’s history when CO2 was 10 times higher or more and I believe some of those were cold (or at least not excessively warm). Those were millions of years ago. So there is paleohistorical support, but not historical support (although there are cases of spot measurements made in the 1800’s being high from local conditions).