Century-old battery technology given new life

Nickel-iron batteries, a rechargeable technology developed by Thomas Edison more than a century ago, have been largely out of favor since the 1970s - until now.

California becoming clean energy powerhouse

California regulators have approved five power purchase agreements that could boost the state's renewable energy capacity by 1,088 megawatts (MW) and produce 2,927 gigawatt-hours (GWh) of energy.