More Galleries
The 35 largest U.S. private companies Some of the biggest names in business operate outside the public markets. Here's a look at the top players. (more)
10 private-equity deals gone bust When the liquidity is flowing like wine, every deal looks like a perfect ten. But a lot went wrong between the time that private equity firms professed their love for the following companies and the date the deals were meant to close. (more)
Power List: Where the private equity money is Fortune's exclusive look at the country's most powerful buyout firms. (more)

11 great green ideas

Entrepreneurs are risking their money to develop everything from hybrid vehicles to home solar-panel systems. Here are some of the best concepts.

1 of 11
BACK NEXT
Road runner
Road runner
Steve Fambro was sick of people whizzing past him in the carpool lane, so he decided to do something about it. He set out to design a three-wheeled vehicle -- technically a motorcycle -- that would make it legal for him to drive alone in that lane and be cozy enough for daily commuting. With an infusion of $20 million from Idealab, Bill Gross's business incubator, Fambro's company, Aptera, is scheduled to begin production of the $30,000 electric hybrid later this year. -- Telis Demos

NEXT: Solar smarts
Last updated April 21 2008: 9:03 AM ET
* : Time reflects local markets trading time.† - Intraday data delayed 15 minutes for Nasdaq, and 20 minutes for other exchanges.• Disclaimer