He’s outspoken, irreverent and completely unapologetic. And Silicon Valley can’t get enough of him. Entrepreneur-turned-venture capitalist Vinod Khosla is known as much for his often-controversial views on just about everything as he is for his fervent championing of socially relevant innovation, especially in cleantech, healthcare and education. khoslaventures, the company the 58-year-old founded in 2004 with family funds, currently has a portfolio of approximately 50 companies in the sustainability space, and nearly 70 in the infotech space, from wearable computing and social media to payment solutions and enterprise and cloud. In a freewheeling conversation, Khosla discusses entrepreneurship,innovation and the culture in Silicon Valley. Excerpts: