Researchers at Black Hat say the current generation of energy devices aren't ready for mass deployment.
The prototype electric-drive system is built into one of the company's existing vehicles.
A one-step process for converting cellulose into ethanol produces high concentrations of the fuel.
Nissan says wireless charging could make it easier to keep EVs topped off.
The company's technology for generating and managing energy could reduce strain on the grid.
A sprawling solar farm is planned for sunny central Washington State.
Congress pushes back against the Obama administration's decision to stop research into hydrogen-powered vehicles.
Oil tycoon T. Boone Pickens is backing out of a planned 4,000-megawatt wind farm.
But the bill, which includes caps on carbon dioxide emissions, is still far from becoming law.
Another state forgoes a commonsense approach to reducing gas consumption.