Emissions from transportation, on the other hand, were up.
Giant batteries can extend the reach of wind and solar power — which accounted for 22% of electricity generated last year, the EIA says.
More offshore wind projects are being approved, but many are also running into economic and logistical challenges.
"Forecast-informed reservoir operations" may help planners deal more effectively with flood or drought conditions.
Fifty years ago this fall, Arab members of OPEC cut off their oil exports to the United States.
You may not think much about electrical distribution transformers, but not having them can delay entire housing developments and grid updates.
Shipments of solar panels reached a record high last year, though most were imported. They're also getting cheaper.
It's a small market so far, but using the excess supply of used batteries could help meet the high demand for stored clean energy.
How to staff up the slew of renewable energy projects ushered in under the legislation is a pressing question within the industry.