Composite Environmental Impact Index


2 comments posted
The nuts and bolts of CEII

This site is very informative. Comparing CEII for various processes raise a question which I cannot seem to figure out: How do quantify the CEII numerical value for each component or part of a production process ? E.g. how do you weigh the pollution of chemical pollution during production of Photovoltaic cells as compared to the env impact from producing coal ?

Is it not a question of setting the weight of each impact to a value that will give you any CEII you desire, (in theory) ?

Tor Egil Bye

Posted by Anonymous on Wed, 07/02/2014 - 15:41
Unfortunately, you are right

Unfortunately, you are right about the weights. How do you compare having mercury in your air (pollution part of CEII) versus not having water to drink (resource depletion part of CEII)? There are some arbitrary weights set, but it is a better practice to compare only the parts of CEII you are actually interested in (PI versus PI, etc.) Within a category, it is a little better structured. The effects of pollution can be quantified, and actually IS quantified by the EPA, and their basic PIs are set to reflect the toxicity data available (see the Pollutant data page). But across categories, that's a little more tricky problem.

Posted by andrzejc on Tue, 11/04/2014 - 09:44