The new technology could move the United States away from its dependence on fossil fuels--if it can overcome the high price tag for the massive plants needed.
With electric vehicles hitting the streets and level 3 DC fast-charging stations getting ready to pop up along busy interstate corridors, readers wondered if frequent EV charging would reduce battery life span and void the warranty.
Chevy Volt's $41,000 price tag caused some sticker shock, but the first buyers appear willing to pay. Will it lead to the mainstreaming of electric vehicles?
Start-up pulls in nearly $30 million to go after the utility market with large-scale systems that make wind and solar power more reliable suppliers of electricity to the grid.
Microsoft inks a deal with home energy monitor maker to let people get detailed information on home electricity use without the need for a smart meter.
As part of its smart grid and digital energy push, GE contributes to a $5 million investment in SynapSense, which uses sensors to manage data center energy.
Government fund tells U.N. it supports developers that have earned billions under carbon-offset program, as decision whether to review the program looms. Some say developers produce more greenhouse gas to win more credits.
Work to permanently seal BP's blown-out well may be pushed back a week. Meanwhile, some say BP is stalling on payments to economic victims, and Congress is examining whether company's Libyan oil interests influenced plane bomber's release.
Part of a stimulus plan, the Energy Department creates a California-based "innovation hub" for artificial photosynthesis and funds tests to use waste CO2 in building materials and plastics.