Energy & Green Tech

Salt battery harvests osmotic energy where the river meets the sea

Estuaries—where freshwater rivers meet the salty sea—are great locations for birdwatching and kayaking. In these areas, waters containing different salt concentrations mix and may be sources of sustainable, "blue" osmotic ...

Energy & Green Tech

Fairly sharing the pains and the gains of energy systems

Our energy systems are characterized by two important injustices. First of all, not all people have the same degree of access to these systems (and their advantages). Secondly, the negative consequences of the systems—particularly ...

Energy & Green Tech

Harvesting water from air with solar power

More than 2.2 billion people currently live in water-stressed countries, and the United Nations estimates that 3.5 million die every year from water-related diseases. Because the areas most in need of improved drinking water ...

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