I have been looking into dams to start with, because in previous research I remembered reading about negative socio-economic effects of large dams as well as the obvious impediment of dams on anadromous fish populations. I found a report from the World Commission on Dams that is based on a large amount of research on a large number of dams. I also intend to look into the number and types of fish endangered by large dams and the efficacy of various solutions (fish ladders, etc).