I think that they should not build the hydroelectric dams in brazil because the people living there are claiming there already isnt much fish in the river and adding these dams will only make it harder for them to find food. The people that live there have been protesting because they already struggle with the water supply and also its their land and they should have a say in it. This would not be a good idea because it would only make the life of the people that live there alot harder