Lithium
Researchers suggest 100 percent renewable energy isn’t very green
The increased demand for metals could have social and environmental consequences.
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RIP Klout: The thing you didn't know was still a thing
It once rated your online reach and impact, or something.
Water purification could be the key to more electric cars
You could mine the oceans for lithium without hurting the environment.
Sony working on phone batteries that last 40 percent longer
The catch is they won't be ready until 2020.
