The document discusses the impact of NAFTA on the US chemicals industry over the past 10 years. It finds that US chemical firm exports to Canada increased 38% and exports to Mexico increased 97% from 1992 to 2002. In 2002, US firms captured 71% of Mexico's chemicals import market and 70% of Canada's. NAFTA eliminated tariffs on US chemical imports to Mexico and Canada, providing a competitive advantage. Some US chemical companies have benefited from expanding sales and investment opportunities in Mexico under NAFTA.