European Union ( EU ) rules that would enable car makers to keep information about pollution control systems secret should be illegal , according to UK environmental law firm ClientEarth , which has announced that it will challenge the regulations in the EU 's court of justice . The systems are legally able to reduce emissions even under certain road conditions , resulting in greater pollution . “Dieselgate uncovered the huge lack of political will to hold car manufacturers to account for dangerous and illegal emissions,” said ClientEarth lawyer Anaïs Berthier. Such strategies must be revealed to national regulators , but car makers argue that revealing information to the public would violate commercial confidentiality . ClientEarth claims that secrecy around the system increases the risk of another scandal similar to Volkswagen ’s “ dieselgate ” affair .
European Union ( EU ) rules that would enable car makers to keep information about pollution control systems secret should be illegal , according to UK environmental law firm ClientEarth , which has announced that it will challenge the regulations in the EU 's court of justice . The systems are legally able to reduce emissions even under certain road conditions , resulting in greater pollution . Such strategies must be revealed to national regulators , but car makers argue that revealing information to the public would violate commercial confidentiality . ClientEarth claims that secrecy around the system increases the risk of another scandal similar to Volkswagen ’s “ dieselgate ” affair .