The successful launch of a 3-D-printed drone from a ship shows a possible route to cheaper autonomous aircraft.
Founded by Americans, Promethean Power brings a thermal battery system to small dairy farmers in India and Bangladesh.
Rex Computing’s 19-year-old founder has a plan to dramatically cut the energy used by powerful computers.
Despite massive resources all over the world, only three countries have managed to produce shale gas at commercial scale.
As solar and wind gain wider use, rapid advances in climate forecasting could save money for utilities and ratepayers.
Efficient Power Conversion has launched gallium nitride chips that promise higher efficiency and lower cost than silicon.
Why science denialism and conspiracy theory walk together, suspiciously.
Despite a recent victory, environmental groups have had little luck slowing the boom in new natural-gas power plants.
New research showing dismal results for energy efficiency in homes highlights the need for performance-based measures.
Besides upending an entire sector of employment, self-driving taxis could have significant environmental benefits.