Chile's Patagonia.
Five hydro-electric dams are being planned on two rivers in the region.
More than 30,000 Chileans demonstrated tonight (Friday) in Santiago against the HidroAysén project approved for Patagonia this week by the government.
The 30,000 figure was provided by Carabineros, which made it the largest protest against Pinera's right-wing government thus far, and one of the largest in recent years. The demonstration was peaceful except for a few clashes by small groups against police at the end.
In Valparaiso, police broke up a march because organizers were denied permission to stage the protest. Tear gas and water cannons were used there.
There were similar demonstrations in Iquique, La Serena, Concepción, Chillán, Temuco and Valdivia (in other words, almost the length of Chile).
On May 21, Pinera is scheduled to give his first State of the Union address at the national Congress in Valparaiso. Ecology/environmental organizations are planning massive protests on that day throughout Chile, including inside the Congress building.
Only one year in office and Pinera has a giant problem on his hands.
(edit - typos)