| http://www.w3.org/ns/prov#value | - The US Clean Air Act defined an air pollutant as ???any air pollution agent or combination of such agents, including any physical, chemical, biological, radioactive???substance or matter which is emitted into or otherwise enters the ambient air.??? In a 2007 decision on this question, the Supreme Court ruled clearly on the question: ???Carbon dioxide, methane, nitrous oxide, and hydrofluorocarbons
|
