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Orbiting spacecraft could be refueled with water taken from planetoids—but some experts doubt the economics.
Cars with advanced batteries get 100 mpg and boast far greater range than all-electric vehicles.
Does society really want extremely private mobile devices if they make life easier for criminals? Apple’s newly toughened standards sharpen the focus on that question.
If federally funded factories don’t get enough demand, even more government spending could result.
The $2.4 billion program designed to jump-start the battery industry has met with horrible market conditions.
Caltech researchers demonstrate a clean technique for using heat and catalysts to split water into hydrogen and oxygen.
A second recall of its batteries calls the company’s future into question.
Speeding up a natural weathering process could be a practical way to capture and store carbon dioxide from power plants.
A bold experiment by the One Laptop Per Child organization has shown “encouraging” results.
Obama and Romney campaigns debate climate change and energy policy.