(NC)-Concrete is king in green construction-and it’s in high demand by Canadian home builders who insist on energy efficiency, as well as limiting the use of natural resources. The latest technology developed by Nudura, for example, is reported to provide double the insulation by constructing walls, ceilings and floors with pre-assembled, concrete forms. The Nudura system (consisting of Lego-like blocks of reinforced concrete sandwiched between two layers of polystyrene) makes the building project much quicker to construct, with less waste, and with none of the toxic emissions associated with new buildings. This certified concrete system (nudura.com) is now the base for constructing better homes, schools, hospitals, condominiums, hotels, and offices. Money is saved due to durability and energy efficiency – and the resulting structure is reported to be up to nine times stronger, with far more fire protection, far more sound insulation, and with a potential to reduce energy costs of up to 70 percent.