I absolute agree that this is not 'simple' to quantify but, again, if the environmental organizations are not even make a stab at it in laying out the case, how can anyone complain if others (whether government, 'academic' studies, industry mouthpieces) don't account for it either.

Read that paragraph re recommendation:  do the "conservative" case and then have something that puts meat into the explaining why this is highly conservative.

And, finally, it is unclear that this 'stove-piped' scenario makes the case: there are many uncertainties, choices as to "NPV", etc ... not hard to 'spin' this study in a way that makes this a not viable case for "CFO"/"MBA"-type thinking.

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