Another step in a Sisyphean effort to extract useful energy from the ocean.
The zero emissions city probably won't founder as a result of a neighbor's economic crisis.
Electric vehicles could sneak up on pedestrians; a warning system could head off lawsuits.
The aircraft will one day be used to circumnavigate the globe.
New figures get beyond startup company hype.
A U.S. competition showcases the fastest battery-powered cars and bikes.
Industry experts weigh in at a conference in Washington, DC.
New technology-sharing partnerships could help lead to a climate change agreement.
A battery that could store three times more energy than lithium-ion batteries gets funded.
A system for virtually linking cars could cut fuel consumption by 20 percent, and allow for hands-free driving.