A banner that reads "Botnia Go Home" is seen on the bridge linking Argentina's Gualeguaychu to Uruguay's Fray Bentos across the River Uruguay April 29, 2007, during a demonstration of Argentines who oppose the construction of a pulp mill by Finnish company Metsa-Botnia (seen in the background). Nearly 100,000 people marched near the Argentine city of Gualeguaychu on Sunday to protest the pulp mill project in Uruguay that they fear will pollute the river dividing the two nations.