International Lead Zinc Research Organization (ILZRO) The International Lead Zinc Research Organization (ILZRO) manages environment, health, sustainable development and product-related research programs on behalf of the International Lead Association (ILA) and the International Zinc Association (IZA). Idioma: English / English | International Zinc Association IZA is the only global industry association dedicated exclusively to the interests of zinc and its users. IZA helps sustain the long-term global demand for zinc by promoting end uses as corrosion protection and the essentiality of zinc in human health. Idioma: English / English |