Leadership in Energy and Environmental Design (LEED) is a green rating system for the United States Green Building Council (USGBC). This credit is given to encourage the use of products and materials for which life-cycle information is available and that have environmentally, economically, and socially preferable life-cycle impacts. It also rewards project teams for selecting products for which the chemical ingredients in the product are inventoried using an accepted methodology and for selecting products verified to minimize the use and generation of harmful substances.