Vinod Khosla has spent a fortune financing enviro-startups
                                
                                
                                    (Newser) -
                                    Vinod Khosla isn’t just smarter and richer than the average venture capitalist—he’s greener, too. Khosla has sunk $450 million into what he calls “imprudent science experiments" over the past 4 years, financing 45 enviro-tech startups. “We've funded an incredible number of things that would make...