The Santo Antonio dam, on the Madeira river, in Brazil, is a highly controversial investment approved by the government of president Lula in 2007. As the satellite pictures show bellow, the dam is a major obstacle for the water flow, and consequently also for the fish species. The Madeira river is the largest tributary of the Amazon river.
To see the difference of the river in between 2006 and 2009, click over the picture and drag you mouse to the right.