This triggered an increase in slave revolts, especially in the 1860s and 1880s, which pressured the government to change the program to help keep the nation secure.[13] Slavery was legally abolished in 1888. Brana Itaipu, najveća svjetska hidroelektrana prema proizvodnji energije i druga najveća po instaliranom kapacitetu (fourteen 000 MW) https://bpjohnps.blogdon.net