Richtel writes:

The energy boomlet is part of a broader rebound that is benefiting all kinds of start-ups, including plenty that are focused on the Web. But for many in Silicon Valley, high tech has given way to “clean tech,” the shorthand term for innovations that are energy-efficient and environmentally friendly. Less fashionable is “green,” a word that suggests a greater interest in the environment than in profit.

read the article here: http://www.nytimes.com/2007/03/14/technology/14valley.html?pagewanted=1&_r=2&hp