We live, we're told, in an age of transparency. I can point my iPhone at a box of cereal in the grocery store and GoodGuide will tell me how healthy it is for my family. Wikileaks has infamously bared the inner workings of the U.S. government for all to see. Twitter and Facebook have made it harder for companies to bury bad products and decisions. Yet our homes and office buildings remain black boxes. Are there toxins in the wallboard? Were those hardwood floors sustainably produced? Can any of the building materials be recycled? Your guess is as good as mine. That's about to change, however.