re: So from the mini-iceage until the beginnings of the Heavy Industrial Age
Ed,
When a gas is proven to have greenhouse effects in the lab the burden should be on those that believe that it will not have the same effect in the world at large to prove it. Especially in light of significant data and computer simulations supporting common sense projections of laboratory data and data from planetary comparative planetology. Most of the arguments agianst GW really make no sens ein the context of the total amount of supporting data gathered. They are often counters to one specific piece of data, but do not counter the rest or form any coherenat explanation for all the data. Occum's razor still applies.
Regards,
Mark