The U.S. will still need more big breakthroughs to eliminate the need for imported oil.
Manufacturing, transporting, and constructing the world’s largest wind turbine represents a unique challenge.
Chemical producers abandoned the U.S. in droves. Cheap natural gas is luring them back.
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.
Long considered a problematic way to reduce carbon emissions, regulations may be our best option.
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.
Crop yields are expected to decline due to climate change faster than scientists thought.
But is the company scaling up its technology too fast?