Pushes for disclosure - and disclosure of what - can vary depending on where you are. Provided fair standards and reasoned accuracy, this one - from Washington Representative Cathy McMorris Rodgers - sounds like a useful part of the mix.
Her proposal (observed via NW Republican) is the Endangered Species Transparency Act of 2007, "The bill requires Power Marketing Administrations, including the Bonneville Power Administration, to estimate and report the direct and indirect costs associated with the Endangered Species Act to each wholesale power customer on a monthly billing basis."
There are costs, of course; how much gets into dispute, and becomes political. This sounds as if it could - properly managed - put some fact into the situation.