the amount outputted by fossil fuel burning and cement making
At the current (~$15/94# sack) price of a sack of cement, I'm about ready to buy some coal (or coke some of my beetle-killed timber into charcoal) and burn some of our limestone.
If the Romans could do it, I should be able to.
56 posted on 11/13/2010 10:57:05 PM PST by ApplegateRanch
(Made in America, by proud American citizens, in 1946.)