A more efficient generator could convert more of the wind's energy into electricity.
A silicon coating could boost the efficiency of solar cells.
Improved dyes and electrolytes could make the Grätzel solar-cell design more practical.
A system that detects gusts before they arrive reduces wear, boosts output.
Geologists discover that certain rock formations could sequester large amounts of carbon dioxide.
An engine from Lotus and Continental Powertrain consumes 15 percent less fuel.
A new type of silicon promises cheaper, more-sensitive light detectors.
A startup has raised $25 million for inexpensively producing biofuel.
New designs could decrease the chances that nuclear materials will fall into the hands of terrorists.
A novel photovoltaic technology moves into large-scale production.