Dye-sensitized cells get a double boost from nanowires and optical fiber.
A continuously variable transmission could lead to cheaper wind power--if it is rugged enough.
Rechargeable zinc-air batteries can store three times the energy of a lithium-ion battery.
Speaking at MIT, Obama countered recent statements from his administration that climate legislation is bogged down.
The low-cost cells make their debut on electronics-charging bags.
Thin-film silicon solar cells are more efficient with tiny holes in the back electrical contact.
A U.S.-Chinese venture is out to prove the benefits of quick-charge buses.
Startup Coskata has opened a "semi-commercial" ethanol plant to demonstrate its technology.
New lasers will be key to making fusion energy and proton therapy practical.
Smaller and more practical electron-beam emitters could save millions of tons of C02 emissions.