Fast reactors can shrink nuclear-waste stockpiles, but can designers tame the inherent hazards?
Advanced materials and smart design could lower turbine blade costs by 40 percent.
A proposed engine design approaches the efficiency of gas-electric hybrids, but could be far cheaper.
The technology could make it cheaper to use wind and solar power and to switch to natural gas from coal.
But is the company scaling up its technology too fast?
It will likely take a decade, but improvements to lithium-ion batteries could lead to much cheaper EVs.
It’s not enough to have compelling technology—small solar companies need a solid business model, rich partners, and manufacturing know-how.
Better Place got it wrong: First make a car that people want, then build infrastructure to let them drive it cross-country.
Solar manufacturers like Suntech are struggling. Hundreds need to die for the industry to recover.
Global warming changes precipitation patterns, making some areas drier, and some far wetter.