Certain requirements must be met for recycling to be economically feasible and environmentally effective. Gold Certification, making it one of the most environmentally sustainable skyscrapers in the world. It has application in environmentally sustainable dust suppression agent for roads. Precast concrete is nontoxic and environmentally safe. Some national governments promote socially and environmentally responsible corporate practices. These materials are billed as environmentally friendly. The product line focuses on creating environmentally friendly and affordable products. Bioremediation is said to be cost-effective and environmentally friendly. Green marketing is the marketing of products that are presumed to be environmentally safe. Employees like to be associated with companies that are environmentally friendly. Anodizing is one of the more environmentally friendly metal finishing processes. Copenhagen is recognized as one of the most environmentally friendly cities in the world. It is one of the world's most environmentally friendly skyscrapers. The most criticized issue about constructing environmentally friendly buildings is the price. Generally speaking, actions that are environmentally friendly carry a positive normative belief.