Environmental Technology Verification (ETV) consists in the verification of the performance of environmental technologies or in other words is the establishment or validation of environmental technology performance by qualified third parties based on test data generated through testing using established protocols or specific requirements. There are several ETV programmes running all over the world, organised through government initiatives, with the pioneer programme being the one developed in the United States of America, followed by the Canadian ETV Programme. Other programmes have run or are running in South Korea, Japan, Bangladesh, Denmark, France, Europe, Philippines and China. Each programme has its own definitions, structure and procedures and programmes are not always inter-compati