Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
A good first order approximation might be to include an environmental cost term in all cost/benefit analyses that captures the climate change impact of both construction and lifetime operation. Then the per ton charge for methane release would be twenty times that for CO2, etc.

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Fri Dec 27th, 2013 at 10:27:46 AM EST
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