NAFTA has interfered with Canadian laws concerning environmental protection.  Under NAFTA, if foreign investors believe they are being harmed by regulations, they may sue for reparations under special tribunals1. Canada regulates commercial use of its lake and river water2, fearing ecosystem damage, and had previously banned the importation of a gasoline additive MMT3. Due to lawsuits brought by American companies Sun Belt Water Inc. and Ethyl Corporation, the Canadian government was forced to change legislation to allow these companies to conduct business. By compelling Canada to reduce its standards for environmental protection, NAFTA has failed to meet Canada's interests.  1 Joseph E. Stiglitz, "The Broken Promise of NAFTA," New York Times, January 6, 2004.  2 "The Sun Belt NAFTA Case." Sun Belt Water, 2004.  3 Kerr, Jim. "Auto Tech: MMT: the Controversy Over this Fuel Additive Continues." March 10, 2004.