China begins construction on World's largest hydroelectric dam

China began construction this weekend on what is expected to be the largest hydroelectric dam in the world. The project on the Yarlung Tsangpo river in Tibet is controversial, as it could disrupt a protected nature reserve. India has also raised concerns that the dam would reduce the water flowing into northeastern India and Bangladesh. The World's Host Carolyn Beeler spoke with Professor Scott Moore from the University of Pennsylvania about the water politics surrounding the project.