Drawbacks to which energy source include build up of silt or disruption of salmon migration?
Nuclear energy
Geothermal energy
Photovoltaic cells
Hydroelectric power

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.

Ansradar; im guessing here; good luck : )