High prices still haven't prompted companies to use advanced extraction methods.
A technology developed by IBM to cool computer chips could be a boon for solar energy.
A simple new process generates hydrogen for fuel cells.
A new membrane-free water-purification system uses small amounts of energy.
A city being built in Abu Dhabi will serve as a large-scale test for renewable energy.
Demand for corn-derived fuel is driving up food prices, but new technologies could help.
Better wind forecasts could prevent blackouts and reduce pollution.
Researchers genetically modify a crop to break down its own cellulose.
The London Olympics' site reflects a trend toward urban planning that contemplates climate resiliency and reduced emissions.
Heating and air-conditioning systems that use thermoelectrics could make plug-in hybrids more practical.