This led to a rise in slave revolts, particularly in the 1860s and 1880s, which forced The federal government to change the system to help keep the country secure.[13] Slavery was legally abolished in 1888. Brana Itaipu, najveća svjetska hidroelektrana prema proizvodnji energije i druga najveća po instaliranom kapacitetu (14 https://hvvitorjn.bluxeblog.com