ISO 14001 is a voluntary international standard that defines the elements of an environmental management system (EMS) needed for an organization to effectively manage its impact on the environment. The ISO 14001 standard aims to integrate the EMS into business management practices, and was established in 1996 by the International Organization for Standardization (ISO) in cooperation with industry, governments, and non-governmental organizations.

More info is available at https://www.iso.org/standard/60857.html