Threede printing could be used to solve the affordable housing problem. The construction industry creates almost 30 % of the world's overall waste. With a threedy printed house, builders only need to print exactly what they need. This process saves time and you don't need as many hands on deck either. It also reduces carbon dioxide emissions by up to 70%. So if t's faster, cheaper and more end vihomently friendly, whats stopping the world from embracing this?