Property rights have always been subject to laws enacted by the State. Many are justified, many are not. Most environmental groups would not recognize Agenda 21 under any guise. Treaty obligations have the force of law according to the US Constitution.
Even without state involvement companies are subject to tort law for damages they produce. So there is little doubt that suits by individuals claiming such damages have a good chance here since the People have a very negative attitude toward business and regularly use the courts as punitive institutions against it.
It is the attitude of a large segment of the People which empowers this kind of thing. Polls indicate that the EPA is one of, if not THE, most beloved agencies of the government.