Environmental auditing originated in the 1970s in the United States and was introduced to other countries mainly by multinational corporations. It has historically been developed for industrial applications like the chemical and manufacturing industries. Environmental auditing is broadly defined and involves systematically evaluating an organization's environmental performance and compliance with policies. There are different types of environmental audits, including liability audits that assess compliance with legal obligations and management audits that verify environmental strategies meet objectives. Environmental auditing is integrated with environmental management systems and is becoming a standard tool, while pressures to disclose audit results are increasing.