Niche applications will help advanced power-grid-battery technology.
An upgrade to the Roadster extends its range and shows how far battery technology has come.
The year saw a major new report on climate change—and modest movement on renewables, carbon burial, and emissions agreements.
Singapore plans to let anyone test driverless cars in one of its busy neighborhoods in 2015.
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.