Bolivia, Paraguay, Mongolia, Chad, Kazakhstan, Switzerland
<span>When the strength of the rock exceeded it suddenly breaks causing an earthquake </span>
Plate Tectonics, that would be the answer <span />
Solar is inconsistent due to time of day and/or weather.
Nuclear creates long lasting radioactive waste.
Hydroelectric construction of this resource destroys river ecosystems.
Coal creates pollution when burned.
Wind is inconsistent due to only to weather.