China is building huge hydropower dams in Tibet, high up in the mountains where the Yellow River (known as Machu in Tibet) starts. However, these massive projects have raised serious concerns. Scientists and environmental experts worry that these dams could cause dangerous disasters and hurt the environment in ways we can’t fully predict.

A new report by the Turquoise Roof research network has sounded the alarm about these projects, which are set to change the flow of Asia’s most importa...