What would it take to put the silicon back in Silicon Valley? @mattparlmer, founder and CEO of @genfabco: "It would be very, very cool to put the silicon back in Silicon Valley." "We certainly have the workforce here at a higher density than anywhere else in the country. Maybe the world." "But the electricity is just a serious, serious problem. And the environmental regulations, which do exist for a reason... they currently block any serious semi-fab build-out in California." "You go right…