After timber shortages devastated the North American construction industry, Australia is predicted to soon follow.  The next 15 years could see a deficit of 250,000 wooden house frames if more trees are not planted.  The shortage may slow the development of building projects while pushing up costs.  Worldwide timber scarcity means Australia will have to rely on domestic supplies exclusively, as one quarter of timber is currently imported.  Master Builders Australia Chief Executive Officer Denita Wawn says the crisis is a “wake-up call” for Australia to act now ...