biggest producer of cellulose pulp in Latin America. As of 2005, Argentina produced 1.5 million tons. The major plants are located in Misiones and they use pinewood as their raw material. The most important plants in this region are Alto Paraná S.A. and Papel Misionero S.A. There are also other plants that use fiber from eucalyptus as raw material for both the production of cellulose fiber and paper. Pulp mill dispute There are also other issues that can make some aspects of the industry uncertain. Currently there is a dispute between Uruguay and Argentina over two cellulose plants that are being built on the Uruguayan side of the Río de la Plata, which forms the border between the two countries. This dispute began after Argentine environmentalists alleged that the plants would pollute the river that divides the two countries, and asserted that Uruguay had not provided the necessary information on the environmental impact of the plants. In protest, Argentine environmentalists blocked traffic on the Libertador General San Martín Bridge and General Artigas Bridge, the two main international bridges connecting the two countries. As of now, the Argentine and Uruguay government have not been able to resolve the issue. This impasse could possibly slow down the development and introduction of new technologies for the forestry sector. Such technologies are crucial to increase cultivated land and production. Argentina has the potential to become a major cluster for the worldwide industry, but more investment is necessary. Paper production Argentina is the fourth largest producer of paper, paperboard and corrugated fiberboard in Latin America. As of the 2004, the sector produced about 1.4 million tons. The production experienced an increase of 11 percent compared to 2003. However, this production only satisfied 67 percent of domestic demand. The paper production in Argentina is primarily for packing (48 percent), printing (25 percent), and newspapers (13 percent). The forestry sector in Argentina experienced significant growth rates between 2001 and 2006. An estimated 1.115 million hectares (2.8 million acres) were planted as of 2005. It is estimated that this year, between 40,000 and 50,000 hectares (100,000 to 124,000 acres) will be cultivated mainly in the Mesopotamia region (the provinces of Misiones, Corrientes, and Entre Ríos). Among the most important species cultivated in the country are pines and eucalyptus, representing 50 and 30 percent of production, respectively. Major factors that have contributed to the industry's growth have been the