25 Who Ditched Infotech for Cleantech

Bob Metcalfe

Background: Inventor of Ethernet, founder of 3Com

Current: Partner at Polaris Venture Partners, CEO GreenFuel

The father of Ethernet and the creator of Metcalfe’s Law, which calculates the value of the network effect, Metcalfe says the history of the Internet is a “rich vein to mine” when it comes to building the next generation of energy technology. He’s calling the future power grid the “Enernet.” Currently he’s finding investments for Polaris Ventures, and leading an algae biofuel firm.