Dams, especially massively tall ones built in earthquake country on salmon streams, are not necessarily 'green' just because they don't use fossil fuels.  Alaska has Many options for energy supply.  It's unfortunate that large urban centers often create their own problems because of the HUGE energy demands they, and their residents create, compared to more reasonable rural users.   Something the urbanites need to deal with - but not by destroying other parts of the State to do it.