Startup Seeo has developed batteries that store far more energy than conventional ones, which could extend the range of electric cars.
The way the Land of the Rising Sun built and lost its dominance in photovoltaics shows just how vulnerable renewables remain to changing politics and national policies.
Nations agree to start drafting climate action plans, which could encourage greater investment in clean energy.
Equipment for making microchips has led to solar cells that are twice as efficient as conventional ones.
Severe droughts are forcing researchers to rethink how technology can increase the supply of fresh water.
Hybrids are a much more cost-effective way to reduce carbon emissions than newly released hydrogen fuel cell cars.
The first commercial power plant to use carbon capture and sequestration shows the potential of a crucial technology.
Millions of batteries discarded with computers have more than enough life to power home lighting for one year, researchers in India say.
Inexpensive oil could increase the pressure to reduce mandates for biofuels.
A new material that requires no electricity uses the universe as a heat sink—even when the sun is shining.