GREEN BUILDING There are many steps that can be taken to build or retrofit a building so that it has less environmental impact and is a healthier environment for those who live, work, or go to school there. The nonprofit group, Canada Green Building Council, certifies buildings through its LEED program (Leadership in Energy and Environmental Design). Buildings receive a standard, silver, gold, or platinum rating, based on a variety of criteria that include energy efficiency, sustainable building material use, and innovative design.