Plan A: Argentina

Argentina

Santa Cruz is the country’s second-largest (94,187 square miles) and least densely populated (2.9 persons per square mile) province.

Santa Cruz Province

54 km (34 miles) SW of the port of San Julián lies the (2,900 sq km (1,119.7 sq mi) depression of the same name.

San Julian Depression, aerial view
San Julian Depression, aerial view
San Julian Depression
San Julian Depression

Within the depression lies the Laguna del Carbón, an endorheic salt lake 105 meters (344 ft) below sea level, the lowest point in the Western and Southern Hemispheres and the seventh lowest point on Earth.

Laguna Del Carbon
Laguna Del Carbon

Currently the depression has little or no use. Instead, it could be utilized to produce hydrogen by electrolysis of seawater. The first step would be to carve a sea-level canal from the coast to the depression. That would keep it full by gravity which would avoid pumping costs.

Seal level canal
Seal level canal
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