Additional ancillary agreements have been adopted to allay concerns about the potential impact of the treaty on the labour market and the environment. Critics feared that U.S. and Canadian companies in Mexico would have generally low wages, which would lead to a shift of production to Mexico and a rapid reduction in manufacturing employment in the United States and Canada. Meanwhile, environmentalists were concerned about the potentially catastrophic effects of rapid industrialization in Mexico, which does not have experience in implementing and enforcing environmental legislation. Possible environmental problems were raised in the North American Environmental Cooperation Agreement (NAAEC), which established the Commission for Environmental Cooperation (CEC) in 1994. President Donald Trump cried as he promised to repeal NAFTA and other trade deals he considered unfair to the United States. On August 27, 2018, he announced a new trade agreement with Mexico, which is expected to replace it. The U.S.-Mexico trade agreement, as has been said, would maintain duty-free access for agricultural products on both sides of the border and eliminate non-tariff barriers, while encouraging more agricultural trade between Mexico and the United States and effectively replacing NAFTA. Since NAFTA was adopted, U.S. trade interests have often expressed very satisfaction with the agreement. Trade has grown strongly between the three NAFTA nations, but this increase in trade activity has led to growing trade deficits for both the United States with Canada and Mexico-;d the United States imports more from Mexico and Canada than it exports to these trading partners. Critics of the agreement argue that NAFTA is at least partly responsible for these trade deficits and the striking job losses in U.S.
manufacturing over the past decade. But before NAFTA, manufacturing jobs were starting to shrink. The NAFTA debate continues. The passage of NAFTA has removed or removed barriers to trade and investment between the United States, Canada and Mexico. The impact of the agreement on issues such as employment, the environment and economic growth has been the subject of political controversy. Most economic analyses have shown that NAFTA has been beneficial to North American economies and the average citizen, but has been detrimental to a small minority of workers in sectors subject to trade competition.   Economists have estimated that the withdrawal from NAFTA or the renegotiation of NAFTA, in a way that would have created restored trade barriers, would have affected the U.S. economy and cost jobs.    However, Mexico would have been much more affected, both in the short term and in the long term, by the loss of jobs and the reduction of economic growth.  Sixth, the agreement provided business travellers with easy access to all three countries.
The Clinton administration negotiated with Canada and Mexico a secondary environmental agreement, the North American Environmental Cooperation Agreement (NAAEC), which led to the creation of the Commission for Environmental Cooperation (CEC) in 1994. In order to allay concerns that nafta, the first regional trade agreement between a developing and two developed countries, would have negative effects on the environment, the Commission was tasked with carrying out an ex post-post environmental assessment it created one of the first ex-post frameworks for the environmental assessment of trade liberalization, which was to provide a certain amount of evidence regarding the initial assumptions concerning NAFTA and the environment. , such as the fear that NAFTA could create a „race to the bottom“ of environmental regulation between the three countries or that NAFTA would put pressure on governments to strengthen their environmental protection.  The CEC organized four symposiums on assessing the impact of NAFTA on the environment and requested 47 contributions from first-time independent experts