With little more than a mallet, glue gun, and color-coded instruction manual, 11 unskilled laborers built an entire 96-unit apartment building in Palm Springs, Florida, in less than two months. The interlocking blocks, which snap together like Lego bricks, were developed in Turkey and used in more than 100 building projects there since 2012. Renco, a fully recyclable mix of repurposed glass and plastic, calcite dust, and resin, has now been approved for construction in the US. Executives of Coastal Construction, a general contractor based in South Florida that builds high rise housing and hotels, heard about Renco in 2010 and saw it at firsthand in Turkey. Coastal Construction has just completed a production facility in Florida which can produce enough Renco blocks to build 5,000 apartment units a year.