But how do we figure out the cost of each ton of steel produced? Apparently, this may not be easy as the article Hate Calculus? Try Counting Cow Carbon shows. Here is the intro:
"Shoppers soon will be able to buy everything from meat to moccasins based on a number that purports to tell them the products' environmental impact.
Manufacturers and retailers across the globe are working to measure their products' carbon footprints for a variety of reasons, and all of the efforts have one thing in common: The results have the appearance of precision.
But all the decimal points in the world can't hide the fact that measuring carbon footprints is inexact. It is clouded by varying methodologies and definitions -- not to mention guesses."