This triggered a rise in slave revolts, particularly in the 1860s and 1880s, which pressured The federal government to change the program to keep the place secure.[thirteen] Slavery was legally abolished in 1888. Brana Itaipu, najveća svjetska hidroelektrana prema proizvodnji energije i druga najveća po instaliranom kapacitetu (14 000 MW) https://adgiseladr.jiliblog.com