Nanosolar, funded by a bunch of firms including Benchmark Capital and the hedge fund SAC Capital, is going head-to-head with Miasole, which is backed by, among others, Kleiner Perkins (Doerr's firm).
These two startups may well be the Yahoo and Excite@Home of solar. Investment bankers certainly know an opportunity when they see it. "Our view is it's the next technology space for the next 20 years," says Jeff Lipton of Jefferies & Co., one of several banks hoping for some red-hot green action.
What, you may be asking, makes all these computer people experts on the environment? Well, not much. Miasole is headed by an executive from the disk-drive industry. Nanosolar's Roscheisen was previously CEO of eGroups, a dot-com sapling that sold out early to Yahoo.
Even Silicon Valley's attorneys are repotting themselves. Josh Green, a seasoned (and aptly named) securities lawyer, is now an eco-focused VC with Mohr Davidow. "I thought I had as good a shot as anybody," he says.
It's almost easier to single out Valley players who aren't into green. Sequoia Capital, which funded Cisco (Charts ), Yahoo (Charts ), Google (Charts ) and YouTube, doesn't have a clean-tech focus. But Mark Stevens, Sequoia's semiconductor expert, recently spent four months studying the field.
@Ventures, the VC arm of dot-com flameout CMGI, has devoted its most recent fund to clean-tech investments. It just bought into a company called Earthanol, which is building plants to convert waste into ethanol.
Back in Doerr's office, a stack of the book "An Inconvenient Truth," by his friend Al Gore, lies on the floor. Fred Krupp, president of Environmental Defense, is waiting on hold. I ask Doerr if green is the next bubble. "The Internet wasn't a bubble," he objects. "It was a boom."
He explains that green investments will thrive because of ballooning energy prices, promising new technology and seismic shifts in public opinion and government policy. He's got a point. Could he be right? Why not? Bear in mind that those dot-com-era prognostications no longer seem so ridiculous. Just because a guy says things like "Let's get some green giants here in this jolly valley" doesn't mean he isn't about to make his next killing.
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