 Unlike the rest of the Free Trade Agreements that Mexico has signed, NAFTA is more comprehensive in its scope and was complemented by the North American Agreement for Environmental Cooperation (NAAEC) and the North American Agreement on Labor Cooperation (NAALC).An updating of the 1994 NAFTA, the U.S., Mexico, Canada (USMCA) is pending in early 2020, awaiting the ratification by Canada; the U.S. and Mexico have ratified it.The NAAEC agreement was a response to environmentalists' concerns that companies would relocate to Mexico or the United States would lower its standards if the three countries did not achieve a unanimous regulation on the environment.