At the present rate of innovation in the building materials industry , we may not be far away from a day when a tree will just be a pretty green thing that holds a swing. A new contribution to the wood-free house is a line of interior doors introduced earlier this year by Masonite. The doors are made of a form of engineered lumber trade named DorCor™ which is made from compressed wheat straw. The doors look like any molded door and are available in both passage and bi-fold styles and come in...