Energy technologies emitting differing proportions of methane (CH4) and carbon dioxide (CO2) vary in their relative climate impacts over time, due to the distinct atmospheric lifetimes and radiative efficiencies of the two gases. Standard technology comparisons using the global warming potential (GWP) with a fixed time horizon do not account for the timing of emissions in relation to climate policy goals. In this project we developed an alternative approach for policy makers, engineers, and private investors to use in evaluating the time dependent greenhouse gas emissions impacts of energy technologies, and in optimizing energy technology portfolios.
This Final Environmental Impact Statement (EIS) is a supplement to a Final EIS issued by UMTA in August 1975 for the original 97.2-mile Metrorail Syst...
Since the enactment of the National Environmental Policy Act in 1969, there has been considerable change in the efficiency of the preparation and dist...
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